Document:

EXHIBIT
D-2

     

    CERTIFICATE
OF DESIGNATION,

     

    PREFERENCES
AND RIGHTS

     

    of

     

    SERIES
B CONVERTIBLE PREFERRED STOCK

     

    of

     

    MOQIZONE
HOLDINGS CORPORATION

     

    (formerly,
Trestle Holdings,
Inc.)

     

    (Pursuant
to Section 151 of the

    Delaware
General Corporation Law)

    

    MOQIZONE HOLDINGS CORPORATION
(formerly, Trestle
Holdings, Inc.) a corporation organized and existing under the laws of
the State of Delaware (the “Corporation”), the
certificate of incorporation of which was filed in the office of the Secretary
of State of Delaware on ____ __, ____ and amended and restated in its entirety
on ___________, 2009, hereby certifies that the Board of Directors of the
Corporation (the “Board of Directors”
or the “Board”), pursuant to
authority of the Board of Directors as required by Section 151 of the Delaware
General Corporation Law, and in accordance with the provisions of its
Certificate of Incorporation and Bylaws, each as amended and restated through
the date hereof, has and hereby authorizes a series of the Corporation's
previously authorized 5,000,000 shares of preferred stock, par value $0.01 per
share (the “Preferred
Stock”), and hereby states the designation and number of shares, and
fixes the relative rights, preferences, privileges, powers and restrictions
thereof, as follows:

    

    
      I.  DESIGNATION
AND AMOUNT

    

    

    The
designation of this series, which consists of up to Ten Thousand Seven Hundred
and Forty Three (10,743) shares of Preferred Stock, is the Series B convertible
voting Preferred Stock (the “Series B Preferred
Stock”) and the stated value amount shall be One Thousand Dollars
($1,000.00) per share (the “Stated Value
“).

    

    
      II.  CERTAIN
DEFINITIONS

    

     

    For
purposes of this Certificate of Designation, in addition to the other terms
defined herein, the following terms shall have the following
meanings:

    

    A.           “Business Day” means
any day, other than a Saturday or Sunday or a day on which banking institutions
in the State of New York are authorized or obligated by law, regulation or
executive order to close.

    
      
         

      

      
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    B.           “Conversion Date”
means, for any Conversion, the date specified in the notice of conversion in the
form attached hereto (the “Notice of
Conversion”), so long as a copy of the Notice of Conversion is faxed (or
delivered by other means resulting in notice) to the Corporation before 11:59
p.m , New York City time, on the Conversion Date indicated in the Notice of
Conversion; provided, however,
that if the Notice of
Conversion is not so faxed or otherwise delivered before such time, then
the Conversion Date shall be the date the Holder faxes or otherwise delivers the
Notice of Conversion to the Corporation

     

    C.           
“Conversion
Shares” means such number of shares of Common Stock into which any shares
of Series B Preferred Stock shall be converted.

     

    D.           “Holder” shall mean
one or more holder(s) of shares of Series B Preferred Stock.

     

    E.           “Issuance Date” means
the Initial Closing Date contemplated by the Securities Purchase
Agreement.

     

    F.           “Majority Holders”
means the Holders of a majority of the then outstanding shares of Series B
Preferred Stock.

     

    G.           “Original Issue Price”
mean the sum of $10.00, representing the aggregate purchase price for each share
of Series B Preferred Stock at the Stated Value.

     

    H.           “Registration Rights
Agreement” means the Registration Rights Agreement, dated as of June
1, 2009, by and among the Corporation and the initial Holders of Series B
Preferred Stock.

     

    I.           “Securities Purchase
Agreement”  means that certain Securities Purchase Agreement,
dated as of June
1, 2009, by and among the Corporation and the other Parties thereto,
including the Investors named therein.  Unless otherwise defined in
this Series B Preferred Stock Certificate of Designations, all capitalized
terms, when used herein shall have the same meaning as they are defined in the
Securities Purchase Agreement.

     

    J.           “Trestle Exchange
Agreement”  means the share exchange agreement, dated March
15, 2009 among the holders of 100% of the share capital of MoqiZone Holdings
Limited, a Cayman Islands corporation (“MoqiZone Cayman”) and the Corporation,
pursuant to which the Series B Preferred Stock was issued to the shareholders of
MoqiZone Cayman in exchange for 100% of the share capital of MoqiZone Cayman and
its subsidiaries.

     

    
      III.  CONVERSION

    

     

    A.           Automatic
Conversion

     

    Automatic
Conversion. Upon the date of filing the Trestle Certificate of
Incorporation with the Secretary of State of the State of Delaware immediately
following consummation of the Trestle Reverse Split, all (and not less than all)
of the issued and outstanding shares of Series B Preferred Stock shall automatically,
and without any further action on the part of the Corporation or the Holders of
Series B Preferred Stock, be converted into shares of Common Stock of the
Corporation (a “Conversion”).  Each
of the shares of Series B Preferred Stock shall be automatically converted into
that number of Conversion Shares as shall be determined by multiplying such
issued and outstanding share of Series B Preferred Stock being converted, by the
$1,000 per share of Series B Preferred Stock, so that each share of Series B
Preferred Stock converts into 1,000 shares of Common Stock.

    
      
         

      

      
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    Notwithstanding the foregoing, it is
intended that upon the automatic conversion of all shares of Series B Preferred
Stock the Holders, the issued and outstanding Conversion Shares shall represent
ninety-five (95%) of the issued and outstanding shares of Common Stock of the
Corporation after giving effect to such automatic conversion, but before giving
effect to the issuance of any additional shares of Common Stock of the
Corporation that may be issued upon the conversion of shares of Series A
Preferred Stock and/or the exercise of the Warrants authorized for issuance
pursuant to the Securities Purchase Agreement.

     

    (i)           Delivery of Common Stock
Upon Conversion. All shares of Series B Preferred Stock shall be held in
escrow by Leser Hunter Taubman & Taubman.  Upon the date of filing
the Trestle Certificate of Incorporation with the Secretary of State of the
State of Delaware immediately following consummation of the Trestle Reverse
Split, the escrow agent shall deliver all of the shares of Series B Preferred
Stock to the Corporation for cancellation and , the Corporation (itself, or
through its transfer agent, as appropriate) shall, no later than the later of
(a) the fifth (5th) Business Day following the Conversion Date and (b) the
Business Day immediately following the date of such surrender (or, in the case
of lost, stolen or destroyed certificates, after provision of indemnity pursuant
to Article IX B) (the “Delivery Period”),
issue and deliver (i e., deposit with a nationally recognized overnight courier
service portage prepaid) to the Holder or its nominee all of the shares of
Common Stock issuable upon conversion of such shares of Series B Preferred Stock
being converted , less the Performance Shares which shall remain in escrow with
such escrow agent in accordance with the Trestle Share Exchange Agreement and
the Securities Purchase Agreement.  Notwithstanding the foregoing, the
Holder of Series B Preferred Stock shall, for all purposes, be deemed to be a
record owner of shares of Common Stock on the date of filing the Trestle
Certificate of Incorporation with the Secretary of State of the State of
Delaware immediately following consummation of the Trestle Reverse
Split.  In addition, if the Corporation's transfer agent is
participating in the Depository Trust Corporation (“DTC”) Fast Automated
Securities Transfer program, and so long as the certificates therefor do not
bear a legend (pursuant to the terms of the Securities Purchase Agreement) and
the Holder thereof is not then required to return such certificate for the
placement of a legend thereon (pursuant to the terms of the Securities Purchase
Agreement), the Corporation shall cause its transfer agent to promptly
electronically transmit the Common Stock issuable upon conversion to the Holder
by crediting the account of the Holder or its nominee with DTC through its
Deposit Withdrawal Agent Commission system (“DTC
Transfer”).  If the aforementioned conditions to a DTC Transfer
are not satisfied, the Corporation shall deliver as provided above to the Holder
physical certificates representing the Common Stock issuable upon conversion.
Further, a Holder may instruct the Corporation to deliver to the Holder physical
certificates representing the Common Stock issuable upon conversion in lieu of
delivering such shares by way of DTC Transfer.

     

    (ii)           Taxes. The
Corporation shall pay any and all taxes that may be imposed upon it respect to
the issuance and delivery of the shares of Common Stock upon the conversion of
the Series B Preferred Stock.

     

    (iii)           No Fractional
Shares.  If any conversion of Series B Preferred Stock would
result in the issuance of a fractional share of Common Stock (aggregating all
shares of Series B Preferred Stock being converted pursuant to a given Notice of
Conversion), such fractional share shall be payable in cash based upon the
Conversion Price per share, and the number of shares of Common Stock issuable
upon conversion of the Series B Preferred Stock shall be the next lower whole
number of shares.  If the Corporation elects not to, or is unable to,
make such a cash payment, the Holder shall be entitled to receive, in lieu of
the final fraction of a share, one whole share of Common Stock.

    
      
         

      

      
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    B.           Concerning the Conversion
Shares.

     

    (i)           Legend.  The
Conversion Shares issuable upon conversion of the Preferred Stock may not be
sold or transferred unless (A) such shares are sold pursuant to an effective
registration statement under the Securities Act, or (B) the Corporation or its
transfer agent shall have been furnished with an opinion of counsel (which
opinion shall be in form, substance and scope customary for opinions of counsel
in comparable transactions) to the effect that the shares to be sold or
transferred may be sold or transferred pursuant to an exemption from such
registration or (C) such shares are sold or transferred pursuant to Rule
144 under the Securities Act (or a successor rule) (“Rule 144”) or (D) such
shares are sold or transferred outside the United States in accordance with
Regulation S under the Securities Act, or (E) such shares are transferred to an
“affiliate” (as defined in Rule 144) of the Corporation who agrees to sell or
otherwise transfer the shares only in accordance with this
Section.  Except as otherwise provided herein (and subject to the
removal provisions set forth below), until such time as the Conversion Shares
have been registered under the Securities Act of 1933, as amended (the “Act”) as contemplated
by the Registration Rights Agreement, or otherwise may be sold pursuant to Rule
144 without any restriction as to the number of securities as of a particular
date that can then be immediately sold, each certificate for Conversion Shares
that has not been so included in an effective registration statement or that has
not been sold pursuant to an effective registration statement or an exemption
that permits removal of the legend, shall bear a legend substantially in the
following form, as appropriate:

     

    THE
SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE UNITED STATES
SECURITIES ACT OF 1933, AS AMENDED (THE “U.S. SECURITIES ACT”).  THE
HOLDER HEREOF, BY PURCHASING SUCH SECURITIES, AGREES THAT SUCH SECURITIES MAY BE
OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED ONLY (A) TO THE
CORPORATION, (B) OUTSIDE THE UNITED STATES IN ACCORDANCE WITH RULE 904 OF
REGULATION S UNDER THE U.S. SECURITIES ACT, (C) WITHIN THE UNITED STATES
AFTER REGISTRATION OR IN ACCORDANCE WITH THE EXEMPTION FROM THE REGISTRATION
REQUIREMENTS UNDER THE U.S. SECURITIES ACT PROVIDED BY RULE 144 THEREUNDER, IF
APPLICABLE, AND IN ACCORDANCE WITH APPLICABLE STATE SECURITIES LAWS, OR
(D) WITHIN THE UNITED STATES IN A TRANSACTION THAT DOES NOT REQUIRE
REGISTRATION UNDER THE U.S. SECURITIES ACT OR ANY APPLICABLE STATE SECURITIES
LAWS AND THE HOLDER HAS PRIOR TO SUCH SALE FURNISHED TO THE CORPORATION AN
OPINION OF COUNSEL REASONABLY SATISFACTORY TO THE CORPORATION.

     

    (ii)           Removal of
Legend.  The legend set forth above shall be removed and the
Corporation shall issue to the Holder a new certificate therefor free of any
transfer legend only if (A) the Corporation or its transfer agent shall have
received an opinion of counsel, in form, substance and scope acceptable to the
Corporation, to the effect that a public sale or transfer of such Conversion
Shares may be made without registration under the Act and the shares are so sold
or transferred, or (B) the Conversion Shares are registered for sale by the
Holder under an effective registration statement filed under the Act. Nothing in
the Preferred Stock shall affect in any way the Holder’s obligations to comply
with applicable prospectus delivery requirements upon the resale of the
securities referred to herein.

    
      
         

      

      
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      IV.  RESERVATION
OF SHARES OF COMMON STOCK

    

    

    A.           Reserved
Amount.   On or prior to the Issuance Date, the
Corporation shall reserve not less than 10,743,000 shares of its authorized but
unissued shares of Common Stock for issuance upon conversion of the Series B
Preferred Stock, and, thereafter, the number of authorized but unissued shares
of Common Stock so reserved (the “Reserved Amount”)
shall at all times be sufficient to provide for the full conversion of all of
the Series B Preferred Stock (including any Dividend payable thereon)
outstanding at the current Conversion Price thereof.

     

    B.           Increases to Reserved
Amount. During the period that the Corporation remains privately held and
not listed on any recognized stock exchange in the United States or abroad or
the OTC Bulletin Board, the Corporation shall, twice annually, review the
Reserved Amount for any stock splits, or dividends on the Series B Preferred
Stock, or similar situations to determine whether the Reserved Amount needs to
be increased.

     

    
      V.  RANK

    

     

    All
shares of the Series B Preferred Stock shall rank (i) senior to
the Corporation's Common Stock and any other class of securities which is
specifically designated as junior to the Series B Preferred Stock (collectively,
with the Common Stock, the “Junior Securities”);
(ii) senior to
or pari
passu with
any other class or series of Preferred Stock of the Corporation hereafter
created specifically ranking, by its terms, on parity with the Series B
Preferred Stock (the “Pari Passu
Securities”); and (iii) junior to
the Corporation’s Series A Preferred Stock and any class or series of capital
stock of the Corporation hereafter created (with the written consent of the
Majority Holders obtained in accordance with Article IX hereof) specifically
ranking, by its terms, senior to the Series B Preferred Stock (collectively, the
“Senior
Securities”), in each case as to distribution of assets upon liquidation,
dissolution or winding up of the Corporation, whether voluntary or
involuntary.

     

    
      VI.  LIQUIDATION
PREFERENCE

    

     

    A.           In
the event of a merger, sale (of substantially all assets or stock), any
voluntary or involuntary liquidation, dissolution or winding up of the affairs
of the Corporation, then, either (i) after any distribution or payment on Senior
Securities, (ii) simultaneous with any distribution or payment on Pari Passu
Securities, and (iii) before any distribution or payment shall be made to the
Holders of the Common Stock or any other Junior Securities, each Holder of
Series B Preferred Stock then outstanding shall be entitled to be paid, out of
the assets of the Corporation available for distribution to its stockholders, an
amount (the “Liquidation
Preference”) equal to (i) aggregate number of shares of Series B
Preferred Stock then outstanding multiplied by its Stated Value per share; and
(ii) any accrued but unpaid Dividends.  If the assets of the
Corporation are not sufficient to generate cash sufficient to pay in full the
Liquidation Preference, then the Holders of Series B Preferred Stock shall share
ratably (together with holders of any Pari Passu Securities) in any distribution
of cash generated by such assets in accordance with the respective amounts that
would have been payable in such distribution as if the amounts to which the
Holders of outstanding shares of Series B Preferred Stock are entitled were paid
in full.

     

    
      VII.  ADJUSTMENTS

    

     

    The
Conversion Price and the number of Conversion Shares, as the case may be, shall
be subject to adjustment from time to time as provided in this Section VII;
provided, that the
anti-dilution adjustments contemplated by Section E below shall expire on a date
which shall be the twelve (12) month anniversary of the effective date of the
Registration Statement.   In the event that any adjustment of the
Conversion Price as required herein results in a fraction of a cent, such
Conversion Price shall be rounded down to the nearest cent.

    
      
         

      

      
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    A.           Reorganization,
Consolidation, Merger, etc.; Reclassification.  In case at any
time or from time to time, the Corporation shall effect any merger,
reorganization, restructuring, reverse stock split, consolidation, sale of all
or substantially all of the Corporation’s assets or any similar transaction or
related transactions (each such transaction, a “Fundamental Change”),
then, in each such case, as a condition to the consummation of such a
transaction, proper and adequate provision shall be made by the Corporation
whereby the Holder of the Series B Preferred Stock, on the exercise hereof, at
any time after the consummation of such Fundamental Change, shall receive, in
lieu of the Conversion Shares issuable on such exercise prior to such
consummation or such effective date, the stock and other securities and property
(including cash) to which such Holder would have been entitled upon such
consummation of a Fundamental Change if such Holder had so exercised the Series
B Preferred Stock, immediately prior thereto.

     

    If the
Corporation at any time shall, by reclassification or otherwise, change the
Common Stock into the same or a different number of securities of any class or
classes that may be issued or outstanding, the Series B Preferred Stock shall
thereafter be deemed to evidence the right to purchase an adjusted number of
such securities and kind of securities as would have been issuable as the result
of such change with respect to the Common Stock immediately prior to such
reclassification or other change.

    

    B.           Dissolution.  In
the event of any dissolution of the Corporation following the transfer of all or
substantially all of its properties or assets, the Corporation, prior to such
dissolution, shall at its expense deliver or cause to be delivered the stock and
other securities and property (including cash, where applicable) receivable by
the Holder of the Series B Preferred Stock after the effective date of such
dissolution pursuant to this Article to a bank or trust company (a “Trustee”) as
trustee for the Holder of the Series B Preferred Stock.

     

    C.           Continuation of
Terms.  Upon any Fundamental Change or transfer (and any
dissolution following any transfer) referred to in this Article, the Series B
Preferred Stock shall continue in full force and effect and the terms hereof
shall be applicable to any other securities and property receivable on the
exercise of the Series B Preferred Stock after the consummation of such
Fundamental Change or transfer or the effective date of dissolution following
any such transfer, as the case may be, and shall be binding upon the issuer of
any other securities, including, in the case of any such transfer, the person
acquiring all or substantially all of the properties or assets of the
Corporation, whether or not such person shall have expressly assumed the terms
of the Series B Preferred Stock as provided in Section 4(d). In the event the
Series B Preferred Stock does not continue in full force and effect after the
consummation of the transaction described in this Section, then only in such
event will the Corporation’s securities and property (including cash, where
applicable) receivable by the Holder of the Warrants be delivered to the Trustee
as contemplated by Section 4(b).

    

    D.           Extraordinary Events
Regarding Common Stock.  In the event that the Corporation
shall (a) issue additional shares of Common Stock as a dividend or other
distribution on outstanding Common Stock, (b) subdivide its outstanding shares
of Common Stock, or (c) combine its outstanding shares of the Common Stock into
a smaller number of shares of the Common Stock, then, in each such event, the
Conversion Price shall, simultaneously with the happening of such event, be
adjusted by multiplying the then Conversion Price by a fraction, the numerator
of which shall be the number of shares of Common Stock outstanding immediately
prior to such event and the denominator of which shall be the number of shares
of Common Stock outstanding immediately after such event, and the product so
obtained shall thereafter be the Conversion Price then in effect. The Conversion
Price, as so adjusted, shall be readjusted in the same manner upon the happening
of any successive event or events described in this Section VIID. The number of
Conversion Shares that the Holder of the Series B Preferred Stock shall
thereafter, on the exercise hereof as provided in this Section, be entitled to
receive shall be adjusted to a number determined by multiplying the number of
Conversion Shares that would otherwise (but for the provisions of this Section)
be issuable on such exercise by a fraction of which (a) the numerator is the
Conversion Price that would otherwise (but for the provisions of this Section)
be in effect, and (b) the denominator is the Conversion Price in effect on the
date of such exercise.

    
      
         

      

      
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    E.           Subsequent
Offerings.  If the Corporation shall issue any shares of its
Common Stock, or any other note, debenture, warrant, option or other security
that is at any time convertible into or exercisable or exchangeable for, or
otherwise entitles the holder thereof to receive Common Stock (each a “Common Stock
Equivalent” and collectively, “Common Stock
Equivalents”) at a price per share that shall be less than the Conversion
Price in effect on such date (the “Subsequent Offering
Price”), the Conversion Price shall be adjusted downward to a price
determined by multiplying the Conversion Price by the following quotient
(expressed in decimal form):

     

    (a).           the
sum of (i) the Conversion Price in effect before the issuance of such new
securities multiplied by the number of shares of the Corporation’s Common Stock
then issued and outstanding and (ii) the consideration, if any, received by or
deemed to have been received by the Corporation on the issue of such new Common
Stock or Common Stock Equivalent by:

     

    (b).           the
sum of (i) the number of shares of the Corporation’s Common Stock then issued
and outstanding immediately prior to the issuance of such new securities and
(ii) the number of additional shares of Common Stock issued or issuable in
connection with the issuance of such Common Stock Equivalents.

     

    Notwithstanding
the foregoing, no adjustment in the Conversion Price shall be made for shares of
Common Stock issued or Common Stock Equivalents issued, in connection with any
of the following: (a) Common Stock or Common Stock Equivalents issued or
issuable in connection with any securities that are outstanding as at the
Issuance Date of the Series B Preferred Stock, (b) Common Stock or Common Stock
Equivalents issued or issuable under the Securities Purchase Agreement
(including the Series A Preferred Stock or Warrants); (c) Common Stock or Common
Stock Equivalents issued or issuance as “Performance Warrants”
(described in the Memorandum) and/or pursuant to an employee benefit plan,
approved by the Corporation’s board of directors, for directors, officers,
employees, advisors or consultants of the Corporation, (d) payment of interest
on any outstanding Notes or dividends on outstanding shares of Series B
Preferred Stock, (e) Common Stock or Common Stock Equivalents issued or issuable
in full or partial consideration in connection with a merger, consolidation or
purchase of substantially all of the securities or assets of a corporation or
other entity, of (f) any warrants issued to the placement agent and its
designees for the transactions contemplated by the Securities Purchase
Agreement.

     

    For
purposes of this Section VII, the term “Conversion Price” shall mean initially
$1.80, subject to adjustment in the event that any of the anti-dilution
provisions of this Article VII shall have resulted in a change in such
Conversion Price prior to the occurrence of any event that would represent an
additional adjustment in such Conversion Price, as so adjusted.

     

    F.           Notice of
Adjustment.  Upon the occurrence of any event which requires
any adjustment of the Conversion Price, then, and in each such case, the
Corporation shall give notice thereof to the Holder of the Series B Preferred
Stock, which notice shall state the Conversion Price resulting from such
adjustment and the increase or decrease in the number of Conversion Shares
purchasable at such price upon exercise, setting forth in reasonable detail the
method of calculation and the facts upon which such calculation is
based.  Such calculation shall be certified by the Chief Financial
Officer of the Corporation.

    
      
         

      

      
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    G.           Minimum Adjustment of
Conversion Price.  No adjustment of the Conversion Price shall
be made in an amount of less than 1% of the Conversion Price in effect at the
time such adjustment is otherwise required to be made, but any such lesser
adjustment shall be carried forward and shall be made at the time and together
with the next subsequent adjustment which, together with any adjustments so
carried forward, shall amount to not less than 1% of such Conversion
Price.

     

    H.          No Fractional
Shares.  No fractional shares of Common Stock are to be issued
upon the conversion of Series B Preferred Stock, but the Corporation shall pay a
cash adjustment in respect of any fractional share which would otherwise be
issuable in an amount equal to the same fraction of the average Market Price per
share of the Common Stock for the five (5) Trading Days immediately prior to the
date of such exercise.

     

    I.         
  Certain
Definitions.

     

    “Bloomberg” shall mean
Bloomberg, L.P. (or any successor to its function of reporting stock
prices).

     

    “Market Price” means,
as of any Trading Day, (i) the average of the last reported sale prices for the
shares of Common Stock on a national securities exchange which is the principal
trading market for the Common Stock for the five (5) Trading Days immediately
preceding such date as reported by Bloomberg or (ii) if no national securities
exchange is the principal trading market for the shares of Common Stock, the
average of the last reported sale prices on the principal trading market for the
Common Stock during the same period as reported by Bloomberg, or (iii) if market
value cannot be calculated as of such date on any of the foregoing bases, the
Market Price shall be the fair market value as reasonably determined in good
faith by (A) the Board of Directors of the Corporation, or (B) at the option of
a majority-in-interest of the holders of the outstanding Series A Preferred
Stock by an independent investment bank of nationally recognized standing in the
valuation of businesses similar to the business of the
Corporation.  The manner of determining the Market Price of the Common
Stock set forth in the foregoing definition shall apply with respect to any
other security in respect of which a determination as to market value must be
made hereunder.

     

    “Common Stock,” for
purposes of this Section 4VII, includes the Common Stock, without par value per
share, and any additional class of stock of the Corporation having no preference
as to dividends or distributions on liquidation, provided that the shares
purchasable pursuant to the Series B Preferred Stock shall include only shares
of Common Stock, $0.001 par value per share, in respect of which the Series B
Preferred Stock is exercisable, or shares resulting from any subdivision or
combination of such Common Stock, or in the case of any reorganization,
reclassification, consolidation, merger, or sale of the character referred to in
Article VII.A hereof, the stock or other securities or property provided for in
such Section.

     

     “Trading Day” shall
mean any day on which the Common Stock is traded for any period on the principal
securities exchange or other securities market on which the Common Stock is then
being traded.

     

    
      VIII.  VOTING
RIGHTS

    

     

    A.          Holders
of the Series B Preferred Stock shall vote together as a separate class on all
matters which impact the rights, value, or ranking of the Series
B Preferred Stock, as provided herein.

    
      
         

      

      
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    B.           Holders
of the Series B Preferred Stock shall also vote, together with the
Common Stock, on an “as converted” basis, together, as a single class, in
connection with any proposal submitted to the stockholders of the
Corporation.

     

    C.           Except
as set forth in Sections A and B of this Article VII, the Series B Preferred
Stock shall have no other voting rights or other rights to consent to any matter
to which stockholders of the Corporation may vote upon or consent
to.

     

    D.           The
provisions of Section C of this Article VII shall not be applicable if the
implementation thereof would cause the Corporation to be in violation of any
rule, regulation or policy of the National Association of Securities Dealers,
Inc. (“NASD”)
or the United States Securities and Exchange Commission.

     

    
      IX.  MISCELLANEOUS

    

     

    A.           Cancellation of Series B
Preferred Stock If any shares of Series B Preferred Stock are converted
pursuant to this Series B Certificate of Designations, the shares so converted
or redeemed shall be canceled, shall return to the status of authorized, but
unissued Series B Preferred Stock of no designated series, and shall not be
issuable by the Corporation as Series B Preferred Stock.

     

    B.           Lost or Stolen
Certificates. Upon receipt by the Corporation of (i) evidence of the
lost, theft, destruction or mutilation of any Series B Preferred Stock
Certificate(s) and (ii) (y) in the case of loss, theft or destruction, indemnity
(without any bond or other security) reasonably satisfactory to the Corporation,
or (z) in the case of mutilation, the Series B Preferred Stock Certificate(s)
(surrendered for cancellation), the Corporation shall execute and deliver new
Series B Preferred Stock Certificate(s) of like tenor and
date.  However, the Corporation shall not be obligated to reissue such
lost, stolen, destroyed or mutilated Series B Preferred Stock Certificate(s) if
the Holder contemporaneously requests the Corporation to convert such Series B
Preferred Stock.

     

    C.           Waiver
Notwithstanding any provision in this Certificate of Designation to the
contrary, any provision contained herein and any right of the Holders of Series
B Preferred Stock granted hereunder may be waived as to all shares of Series B
Preferred Stock (and the Holders thereof) upon the written consent of the
Majority Holders, unless a higher percentage is required by applicable law, in
which case the written consent of the Holders of not less than such higher
percentage of shares of Series B Preferred Stock shall be required.

     

    D.           Information Rights So
long as shares of Series B Preferred Stock are outstanding, the Corporation will
deliver to each Holder of Series B Preferred Stock (i) audited annual financial
statements to the Holders of Series B Preferred Stock within 90 days after the
end of each fiscal year; (ii) and unaudited quarterly financial statements
within 45 days of the end of each fiscal quarter.  To the extent that
such information is electronically available on the Corporation's website or the
SEC’s website (www.sec.gov) through the Corporation’s Form 10-K Annual Reports,
Form 10-Q Quarterly Reports, Form 8-K Periodic Reports and Annual Reports to
Shareholders, the Corporation need not separately furnish such documents to
Holders of the Series B Preferred Stock.

    
      
         

      

      
        9

        
          

        

      

      
         

      

    

    E.           Notices. Any notices
required or permitted to be given under the terms hereof shall be (i) sent by
certified or registered mail (return receipt requested) or delivered personally,
by nationally recognized overnight carries or by confirmed facsimile
transmission, and shall be effective five days after being placed in the mail,
if mailed, or upon receipt or refusal of receipt, if delivered personally or by
nationally recognized overnight carrier or confirmed facsimile transmission, in
each case addressed to a party or (ii) upon hand delivery by telex (with correct
answer back received), telecopy, e-mail or facsimile at the address or number
designated below (if delivered on a business day during normal business hours
where such notice is to be received), or the first business day following such
delivery (if delivered other than on a business day during normal business hours
where such notice is to be received).   The addresses for such
communications are (i) [  ]; and (ii) if to any Holder to the address
set forth under such Holder's name on the execution page to the Securities
Purchase Agreement, or such other address as may be designated in writing
hereafter, in the same manner, by such person

     

    [REMAINDER
OF PAGE INTENTIONALLY LEFT BLANK]

    
      
         

      

      
        10

        
          

        

      

      
         

      

    

    IN
WITNESS WHEREOF, this Certificate of Designation is executed on behalf of the
Corporation this _ day of __________, 2009.

    

    
      
        
          
            
              
                
                  
                    
                      
                        	 
      	
                                MOQIZONE
      HOLDINGS CORPORATION

                              	
                              
	 
      	

                                (formerly,
      Trestle Holdings,
      Inc.)

                              	
                              
	 
      	 
      	 	 
      
	 
      	
                                By:

                              	 	 
      

                      

                    

                  

                

              

            

          

        

      

    

    
      
        
          
            
              
                	 
      	
                        Name:

                      	 	 
      
	 
      	
                        Title:

                      	 	 
      

              

            

          

        

      

    

    
      
         

      

      
         

        
          

        

      

      
         

      

    

    NOTICE
OF CONVERSION

    

    (To be
Executed by the Registered Holder

    in order
to Convert the Series B Preferred Stock)

     

    The
undersigned hereby irrevocably elects to convert shares of Series B Convertible
Series B Preferred Stock (the “Conversion”), represented by Stock Certificate
No(s). ______________ (the “Series B Preferred Stock Certificates”), into shares
of common stock (“Common Stock”) of Trestle Holdings, Inc. (the “Corporation”)
according to the conditions of the Certificate of Designation, Preferences and
Rights of Series B Preferred Stock (the “Certificate of Designation”), as of the
date written below.   If securities are to be issued in the name
of a person other than the undersigned, the undersigned will pay all transfer
taxes payable with respect thereto.  No fee will be charged to the
Holder for any conversion, except for transfer taxes, if any Each Series B
Preferred Stock Certificate is attached hereto (or evidence of loss, theft or
destruction thereof)

     

    Except as
may be provided below, the Corporation shall electronically transmit the Common
Stock issuable pursuant to this Notice of Conversion to the account of the
undersigned or its nominee (which is) with DTC through its Deposit Withdrawal
Agent Commission System (“DTC Transfer”).

     

    In the
event of partial exercise, please reissue a new stock certificate for the number
of shares of Series B Preferred Stock which shall not have been
converted.

     

    The
undersigned acknowledges and agrees that all offers and sales by the undersigned
of the securities issuable to the undersigned upon conversion of Series B
Preferred Stock have been or will be made only pursuant to an effective
registration of the transfer of the Common Stock under the Securities Act of
1933, as amended (the “Act”), or pursuant to an exemption from registration
under the Act

     

    In lieu
of receiving the shares of Common Stock issuable pursuant to this Notice of
Conversion by way of DTC Transfer, the undersigned hereby requests that the
Corporation issue and deliver to the undersigned physical certificates
representing such shares of Common Stock.

     

    Date of
Conversion: _________________

    
      Applicable
Conversion Price:  $________

    

    
      Number of
Series B Preferred Stock to be converted: _________

    

    
      Number of
shares of Common Stock

    

    
      to be
received pursuant to conversion: _____________________

    

    

    Signature:

    
      Name:

       

    

    
      Address:EXHIBIT
B

    

    NEITHER
THE OFFER NOR THE SALE OF THIS CLASS A WARRANT OR THE SHARES ISSUABLE UPON THE
EXERCISE OF THIS CLASS A WARRANT HAS BEEN REGISTERED UNDER THE SECURITIES ACT OF
1933, AS AMENDED.  EXCEPT AS OTHERWISE SET FORTH HEREIN OR IN A
SECURITIES PURCHASE AGREEMENT DATED AS OF JUNE 1, 2009, NEITHER THIS CLASS A
WARRANT NOR ANY OF SUCH SHARES MAY BE SOLD, TRANSFERRED OR ASSIGNED IN THE
ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT FOR SUCH SECURITIES UNDER THE ACT
OR AN OPINION OF COUNSEL, IN FORM, SUBSTANCE AND SCOPE, CUSTOMARY FOR OPINIONS
OF COUNSEL IN COMPARABLE TRANSACTIONS, THAT REGISTRATION IS NOT REQUIRED UNDER
THE ACT OR UNLESS SOLD PURSUANT TO RULE 144 OR REGULATION D OR REGULATION S
UNDER THE ACT.  FURTHER, HEDGING TRANSACTIONS WITH REGARD TO THE
WARRANTS OR SHARES MAY NOT BE CONDUCTED UNLESS IN COMPLIANCE WITH THE SECURITIES
ACT.

    

    CLASS
A COMMON STOCK PURCHASE WARRANT

    

    THIS CERTIFIES THAT, for value
received, _______________________________, or its registered assigns,
(the “Holder”) is
entitled to purchase from TRESTLE HOLDING, INC. (to be renamed
MoqiZone Holding Corporation), a Delaware corporation, (the “Company”), at any time or from
time to time during the period specified in Section 2 hereof, _____________
(  ), which represents that number of shares of the Company’s common
stock, $0.001 par value per share (the “Common Stock”), as shall be
equal to fifty percent (50%) of the number of shares of Common Stock that are
issuable upon conversion of the shares of Series A Preferred Stock of the
Company (the “Conversion
Shares”)  to be received by the Holder in exchange for his or
its Note (ie. 2,778 Conversion Shares for each $10,000 principal amount of Note
purchased and $1,000 Stated Value of each share of Series A Preferred Stock
received in exchange for such Note), all pursuant to the terms and conditions of
the “Securities Purchase
Agreement” (as hereinafter defined), at an exercise price of equal to
(U.S.) $2.50 per share (the “Exercise Price”).

    

    As used
herein, the term “Class A
Warrant Shares” shall mean the shares of Common Stock that are
purchasable hereunder.  The number of Class A Warrant Shares and the
Exercise Price per Class A Warrant Share are subject to adjustment as provided
in Section 4 hereof.  The term “Class A Warrants” means this
Class A Warrant and the other Class A Warrants issued pursuant to that certain
Securities Purchase Agreement, dated as of June 1, 2009 (the “Securities Purchase
Agreement”), by and among the Company, the “MoqiZone Group,” the other
“Corporate Parties” (as defined therein), and the Investors listed on the
execution page thereof.

    

    Unless
otherwise defined in this Class A Warrant, all capitalized terms, when used
herein, shall have the same meaning as is defined in the Securities Purchase
Agreement.

    
      
         

      

      
         

        
          

        

      

      
         

      

    

    This
Class A Warrant is subject to the following terms, provisions, and
conditions:

    

    1.            Manner of
Exercise.

     

    a.           Procedure.  Subject to the
provisions hereof, this Class A Warrant may be exercised by the Holder, in whole
or in part, by the surrender of this Class A Warrant, together with a completed
exercise agreement in the form attached hereto (the “Exercise Agreement”), to the
Company during normal business hours on any day that banks are generally open
for business in New York City (a “Business Day”) at the
Company’s principal executive offices (or such other office or agency of the
Company as it may designate by notice to the Holder), and upon payment to the
Company in cash, by certified or official bank check or by wire transfer for the
account of the Company of the Exercise Price for the Class A Warrant Shares
specified in the Exercise Agreement for the Class A Warrant Shares specified in
the Exercise Agreement. Shares shall have been registered for resale pursuant to
an effective registration statement.  The Class A Warrant Shares so
purchased shall be deemed to be issued to the Holder or such Holder’s designee,
as the record owner of such shares, as of the close of business on the date on
which the completed Exercise Agreement shall have been delivered, and payment
shall have been made for such shares as set forth above.  Certificates
for the Class A Warrant Shares so purchased, representing the aggregate number
of shares specified in the Exercise Agreement, shall be delivered to the Holder
(without restrictive legend thereon when such exercise occurs while a
registration statement registering under the Securities Act of 1933, as amended
(the “Securities Act”)
the resale of the Class A Warrant Shares so purchased is effective or such Class
A Warrant Shares so purchased may be resold by the Holder pursuant to Rule 144
or any similar successor rule) within a reasonable time, not exceeding three (3)
Business Days, after this Class A Warrant shall have been so
exercised.  The certificates so delivered shall be in such
denominations as may be requested by the Holder and shall be registered in the
name of the Holder or such other name as shall be designated by the
Holder.  If this Class A Warrant shall have been exercised only in
part, then, at the option of the Holder (i) the Holder may surrender this Class
A Warrant to the Company and, unless this Class A Warrant has expired, the
Company shall, at its expense, within a reasonable time, not exceeding three (3)
Business Days, after this Class A Warrant shall have been so exercised, deliver
to the Holder a new Class A Warrant representing the number of shares with
respect to which this Class A Warrant shall not then have been exercised, or
(ii) the Holder may retain this Class A Warrant and the Class A Warrant Shares
purchasable under this Class A Warrant shall be reduced by such number of Class
A Warrant Shares so exercised by the Holder and properly delivered by the
Company hereunder.

    
      
         

      

      
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    b.           Exercise
Limit.

    

    (i)           Notwithstanding
anything to the contrary set forth in this Class A Warrant, at no time may a
Holder of this Class A Warrant exercise their Class A Warrant if the number of
shares of Common Stock to be issued pursuant to such exercise would cause the
number of shares of Common Stock owned by such Holder at such time to exceed,
when aggregated with all other shares of Common Stock owned by such Holder and
its affiliates at such time, the number of shares of Common Stock which would
result in such Holder, its affiliates, any investment manager having
discretionary investment authority over the accounts or assets of such Holder,
or any other persons whose beneficial ownership of Common Stock would be
aggregated with such Holder’s for purposes of Section 13(d) and Section 16 of
the Exchange Act, beneficially owning (as determined in accordance with Section
13(d) of the Exchange Act and the rules thereunder) in excess of 9.99% of the
then issued and outstanding shares of Common Stock; provided, however, that upon
a Holder of this Class A Warrant providing the Corporation with sixty-one (61)
day Waiver Notice that such Holder would like to waive this Section (b)(i) with
regard to any or all shares of Common Stock issuable upon exercise of this Class
A Warrant, this Section (b)(i) shall be of no force or effect with regard to
those shares of Common Stock referenced in the Waiver Notice; provided, further,
that during the sixty-one (61) day period prior to the expiration of the
Exercise Period, the Holder may waive this Section 1(b)(i) by providing a Waiver
Notice at any time during such sixty-one (61) day period; provided, further,
that any Waiver Notice provided during the sixty-one (61) day period prior to
the expiration of the Exercise Period will not be effective until the last day
of the Exercise Period.

    

    2.           Period of
Exercise.

     

    This Class A Warrant is exercisable,
commencing on or after the consummation of the Trestle Reverse Split and the
filing by Trestle with the Secretary of State of the State of Delaware of the
Certificate of Designations for the Series A Preferred Stock, and may be
exercised at any time or from time to time thereafter, until 6:00 p.m., New
York, New York time on May 31, 2012, when this Class A Warrant shall expire (the
“Exercise
Period”).

     

    3.           Certain
Agreements of the Company.

     

    The
Company hereby covenants and agrees as follows:

    

    a.           Shares to
be Fully Paid.  All Class A
Warrant Shares will, upon issuance in accordance with the terms of this Class A
Warrant, be validly issued, fully paid, and non-assessable and free from all
taxes, liens, and charges with respect to the issue thereof.

     

    b.           Reservation
of Shares.  During the
Exercise Period, the Company shall at all times have authorized, and reserved
for the purpose of issuance upon exercise of this Class A Warrant, a sufficient
number of shares of Common Stock to provide for the exercise of this Class A
Warrant.

     

    c.           Listing.  If the Company’s
Common Stock is listed as of the date of this Class A Warrant, or if so listed
in the future, the Company shall maintain its listing of its Common Stock on
each national securities exchange or automated quotation system, as the case may
be, and shall maintain such listing of any other shares of capital stock of the
Company issuable upon the exercise of this Class A Warrant if and so long as any
shares of the same class shall be listed on such national securities exchange or
automated quotation system.

     

    d.           Certain
Actions Prohibited.  The Company will
not, by amendment of its charter or through any reorganization, transfer of
assets, consolidation, merger, dissolution, issue or sale of securities, or any
other voluntary action, avoid or seek to avoid the observance or performance of
any of the terms to be observed or performed by it hereunder, but will at all
times in good faith assist in the carrying out of all the provisions of this
Class A Warrant and in the taking of all such action as may reasonably be
requested by the Holder of this Class A Warrant in order to protect the exercise
privilege of the Holder of this Class A Warrant against dilution or other
impairment, consistent with the tenor and purpose of this Class A
Warrant.  Without limiting the generality of the foregoing, the
Company (i) will not increase the par value of any shares of Common Stock
receivable upon the exercise of this Class A Warrant above the Exercise Price
then in effect, and (ii) will take all such actions as may be necessary or
appropriate in order that the Company may validly and legally issue fully paid
and nonassessable shares of Common Stock upon the exercise of this Class A
Warrant.

    
      
         

      

      
        3

        
          

        

      

      
         

      

    

     

    e.           Successors
and Assigns.  This Class A
Warrant will be binding upon any entity succeeding to the Company by merger,
consolidation, or acquisition of all or substantially all the Company’s
assets.

     

    f.           Delivery
of Common Stock by Electronic Transfer.  In lieu of delivering
physical certificates representing the Common Stock issuable upon exercise,
provided the Company’s transfer agent is participating in the Depository Trust
Company (“DTC”) Fast
Automated Securities Transfer program and the Company has activated such
programs, upon request of the Holder and its compliance with the provisions
contained in Section 1, the Company shall use its best efforts to cause its
transfer agent to electronically transmit the Common Stock issuable upon
exercise to the Holder by crediting the account of Holder’s Prime Broker with
DTC through its Deposit Withdrawal Agent Commission system.

     

    4.           Antidilution
Provisions.  The Exercise
Price and the number of Class A Warrant Shares, as the case may be, shall be
subject to adjustment from time to time as provided in this Section 4; provided,
that the anti-dilution adjustments contemplated by Section 4e below shall expire
on a date which shall be the twelve (12) month anniversary of the effective date
of the Registration Statement.   In the event that any adjustment
of the Exercise Price as required herein results in a fraction of a cent, such
Exercise Price shall be rounded down to the nearest cent.

     

    a.           Reorganization,
Consolidation, Merger, etc.; Reclassification.  In case at any
time or from time to time, the Company shall effect any merger, reorganization,
restructuring, reverse stock split, consolidation, sale of all or substantially
all of the Company’s assets or any similar transaction or related transactions
(each such transaction, a “Fundamental Change”), then, in
each such case, as a condition to the consummation of such a transaction, proper
and adequate provision shall be made by the Company whereby the Holder of this
Warrant, on the exercise hereof, at any time after the consummation of such
Fundamental Change, shall receive, in lieu of the Warrant Shares issuable on
such exercise prior to such consummation or such effective date, the stock and
other securities and property (including cash) to which such Holder would have
been entitled upon such consummation of a Fundamental Change if such Holder had
so exercised this Warrant, immediately prior thereto.

     

    If the Company at any time shall, by
reclassification or otherwise, change the Common Stock into the same or a
different number of securities of any class or classes that may be issued or
outstanding, this Warrant shall thereafter be deemed to evidence the right to
purchase an adjusted number of such securities and kind of securities as would
have been issuable as the result of such change with respect to the Common Stock
immediately prior to such reclassification or other change.

    

    b.           Dissolution.  In the event of
any dissolution of the Company following the transfer of all or substantially
all of its properties or assets, the Company, prior to such dissolution, shall
at its expense deliver or cause to be delivered the stock and other securities
and property (including cash, where applicable) receivable by the Holder of this
Warrant after the effective date of such dissolution pursuant to this Article to
a bank or trust company (a “Trustee”) as trustee for the
Holder of this Warrant.

    
      
         

      

      
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    c.           Continuation
of Terms.  Upon any
Fundamental Change or transfer (and any dissolution following any transfer)
referred to in this Article, this Warrant shall continue in full force and
effect and the terms hereof shall be applicable to any other securities and
property receivable on the exercise of this Warrant after the consummation of
such Fundamental Change or transfer or the effective date of dissolution
following any such transfer, as the case may be, and shall be binding upon the
issuer of any other securities, including, in the case of any such transfer, the
person acquiring all or substantially all of the properties or assets of the
Company, whether or not such person shall have expressly assumed the terms of
this Warrant as provided in Section 4(d). In the event this Warrant does not
continue in full force and effect after the consummation of the transaction
described in this Section, then only in such event will the Company’s securities
and property (including cash, where applicable) receivable by the Holder of the
Warrants be delivered to the Trustee as contemplated by Section
4(b).

    

    d.           Extraordinary
Events Regarding Common Stock.  In the event that
the Company shall (a) issue additional shares of Common Stock as a dividend or
other distribution on outstanding Common Stock, (b) subdivide its outstanding
shares of Common Stock, or (c) combine its outstanding shares of the Common
Stock into a smaller number of shares of the Common Stock, then, in each such
event, the Exercise Price shall, simultaneously with the happening of such
event, be adjusted by multiplying the then Exercise Price by a fraction, the
numerator of which shall be the number of shares of Common Stock outstanding
immediately prior to such event and the denominator of which shall be the number
of shares of Common Stock outstanding immediately after such event, and the
product so obtained shall thereafter be the Exercise Price then in effect. The
Exercise Price, as so adjusted, shall be readjusted in the same manner upon the
happening of any successive event or events described in this Section 4d. The number of
Warrant Shares that the Holder of this Warrant shall thereafter, on the exercise
hereof as provided in this Section, be entitled to receive shall be adjusted to
a number determined by multiplying the number of Warrant Shares that would
otherwise (but for the provisions of this Section) be issuable on such exercise
by a fraction of which (a) the numerator is the Exercise Price that would
otherwise (but for the provisions of this Section) be in effect, and (b) the
denominator is the Exercise Price in effect on the date of such
exercise.

     

    e.           Subsequent
Offerings.  If the Company
shall issue any shares of its Common Stock, or any other note, debenture,
warrant, option or other security that is at any time convertible into or
exercisable or exchangeable for, or otherwise entitles the holder thereof to
receive Common Stock (each a “Common Stock Equivalent” and
collectively, “Common Stock
Equivalents”) at a price per share that shall be less than
the Fixed Exercise Price (as defined below) in effect on such date (the “Subsequent Offering Price”),
the Exercise Price shall be adjusted downward to a price determined by
multiplying the Exercise Price by the following quotient (expressed in decimal
form):

     

    i.           the
sum of (w) the Exercise Price in effect before the issuance of such new
securities multiplied by the number of shares of the Company’s Common Stock then
issued and outstanding and (x) the consideration, if any, received by or deemed
to have been received by the Company on the issue of such new Common Stock or
Common Stock Equivalent by:

    
      
         

      

      
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    ii.           the
sum of (y) the number of shares of the Company’s Common Stock then issued and
outstanding immediately prior to the issuance of such new securities and (z) the
number of additional shares of Common Stock issued or issuable in connection
with the issuance of such Common Stock Equivalents.

     

    Notwithstanding
the foregoing, no adjustment in the Exercise Price shall be made for shares of
Common Stock issued or Common Stock Equivalents issued, in connection with any
of the following: (a) Common Stock or Common Stock Equivalents issued or
issuable in connection with any securities that are outstanding as at the date
of this Warrant, (b) Common Stock or Common Stock Equivalents issued or issuable
under the Securities Purchase Agreement (including this Warrant); (c) Common
Stock or Common Stock Equivalents issued or issuance as “Performance Warrants”
(described in the Memorandum) and/or pursuant to an employee benefit plan,
approved by the Company’s board of directors, for directors, officers,
employees, advisors or consultants of the Company, (d) payment of interest on
any outstanding Notes or dividends on outstanding shares of Series A Preferred
Stock, (e) Common Stock or Common Stock Equivalents issued or issuable in full
or partial consideration in connection with a merger, consolidation or purchase
of substantially all of the securities or assets of a corporation or other
entity or (f) any warrants issued to the placement agent and its designees for
the transactions contemplated by the Securities Purchase Agreement.

     

    For
purposes of this Section, the term “Fixed Exercise Price” shall
mean initially $2.50, subject to adjustment in the event that any of the
anti-dilution provisions of this Section 4 shall have resulted in a change in
such Fixed Exercise Price prior to the occurrence of any event that would
represent an additional adjustment in such Fixed Exercise Price, as so
adjusted.

     

    f.           Notice of
Adjustment.  Upon the
occurrence of any event which requires any adjustment of the Exercise Price,
then, and in each such case, the Company shall give notice thereof to the Holder
of this Class A Warrant, which notice shall state the Exercise Price resulting
from such adjustment and the increase or decrease in the number of Class A
Warrant Shares purchasable at such price upon exercise, setting forth in
reasonable detail the method of calculation and the facts upon which such
calculation is based.  Such calculation shall be certified by the
Chief Financial Officer of the Company.

     

    g.           Minimum
Adjustment of Exercise Price.  No adjustment of
the Exercise Price shall be made in an amount of less than 1% of the Exercise
Price in effect at the time such adjustment is otherwise required to be made,
but any such lesser adjustment shall be carried forward and shall be made at the
time and together with the next subsequent adjustment which, together with any
adjustments so carried forward, shall amount to not less than 1% of such
Exercise Price.

     

    h.           No
Fractional Shares.  No fractional
shares of Common Stock are to be issued upon the exercise of this Class A
Warrant, but the Company shall pay a cash adjustment in respect of any
fractional share which would otherwise be issuable in an amount equal to the
same fraction of the average Market Price per share of the Common Stock for the
five (5) Trading Days immediately prior to the date of such
exercise.

    
      
         

      

      
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    i.           Certain
Definitions.

     

    i.           “Bloomberg” shall mean Bloomberg, L.P.
(or any successor to its function of reporting stock prices).

     

    ii.           “Market
Price” means, as
of any Trading Day, (i) the average of the last reported sale prices for the
shares of Common Stock on a national securities exchange which is the principal
trading market for the Common Stock for the five (5) Trading Days immediately
preceding such date as reported by Bloomberg or (ii) if no national securities
exchange is the principal trading market for the shares of Common Stock, the
average of the last reported sale prices on the principal trading market for the
Common Stock during the same period as reported by Bloomberg, or (iii) if market
value cannot be calculated as of such date on any of the foregoing bases, the
Market Price shall be the fair market value as reasonably determined in good
faith by (A) the Board of Directors of the Company, or (B) at the option of a
majority-in-interest of the holders of the outstanding Class A Warrants by an
independent investment bank of nationally recognized standing in the valuation
of businesses similar to the business of the Company.  The manner of
determining the Market Price of the Common Stock set forth in the foregoing
definition shall apply with respect to any other security in respect of which a
determination as to market value must be made hereunder.

     

    iii.           “Common
Stock,” for
purposes of this Section 4, includes the Common Stock, without par value per
share, and any additional class of stock of the Company having no preference as
to dividends or distributions on liquidation, provided that the shares
purchasable pursuant to this Class A Warrant shall include only shares of Common
Stock, $0.001 par value per share, in respect of which this Class A Warrant is
exercisable, or shares resulting from any subdivision or combination of such
Common Stock, or in the case of any reorganization, reclassification,
consolidation, merger, or sale of the character referred to in Section 4(e)
hereof, the stock or other securities or property provided for in such
Section.

     

    iv.           “Trading
Day” shall mean any day on which the Common Stock is traded for any
period on the principal securities exchange or other securities market on which
the Common Stock is then being traded.

     

    5.           Issue
Tax. The
issuance of certificates for Class A Warrant Shares upon the exercise of this
Class A Warrant shall be made without charge to the Holder of this Class A
Warrant or such shares for any issuance tax or other costs in respect thereof,
provided that the Company shall not be required to pay any tax which may be
payable in respect of any transfer involved in the issuance and delivery of any
certificate in a name other than the Holder of this Class A
Warrant.

    

    6.           No Rights
or Liabilities as a Stockholder. This
Class A Warrant shall not entitle the Holder to any voting rights or other
rights as a stockholder of the Company.  No provision of this Class A
Warrant, in the absence of affirmative action by the Holder to purchase Class A
Warrant Shares, and no mere enumeration herein of the rights or privileges of
the Holder, shall give rise to any liability of the Holder for the Exercise
Price or as a stockholder of the Company, whether such liability is asserted by
the Company or by creditors of the Company.

    
      
         

      

      
        7

        
          

        

      

      
         

      

    

    

    7.         Transfer, Exchange, and
Replacement of Class A Warrant.

     

    a.           Restriction
on Transfer.  This Class A
Warrant and the rights granted to the Holder are transferable, in whole or in
part, upon surrender of this Class A Warrant, together with a properly executed
assignment in the form attached hereto, at the office or agency of the Company
referred to in Section 7(e) below, provided, however, that any
transfer or assignment shall be subject to the conditions set forth in Section
7(f) hereof and to the applicable provisions of the Securities Purchase
Agreement.  Until due presentment for registration of transfer on the
books of the Company, the Company may treat the registered holder hereof as the
owner and holder hereof for all purposes, and the Company shall not be affected
by any notice to the contrary.  Notwithstanding anything to the
contrary contained herein, the registration rights described in Section 8 are
assignable only in accordance with the provisions of the Registration Rights
Agreement.

     

    b.           Class A
Warrant Exchangeable for Different Denominations.  This Class A
Warrant is exchangeable, upon the surrender hereof by the Holder at the office
or agency of the Company referred to in Section 7(e) below, for new Class A
Warrants of like tenor representing in the aggregate the right to purchase the
number of shares of Common Stock, in not less than 1,000 increments, which may
be purchased hereunder, each of such new Class A Warrants to represent the right
to purchase such number of shares as shall be designated by the Holder at the
time of such surrender.

     

    c.           Replacement
of Class A Warrant.  Upon receipt of
evidence reasonably satisfactory to the Company of the loss, theft, destruction,
or mutilation of this Class A Warrant and, in the case of any such loss, theft,
or destruction, upon delivery of an indemnity agreement reasonably satisfactory
in form and amount to the Company, or, in the case of any such mutilation, upon
surrender and cancellation of this Class A Warrant, the Company, at its expense,
will execute and deliver, in lieu thereof, a new Class A Warrant of like
tenor.

     

    d.           Cancellation;
Payment of Expenses.  Upon the
surrender of this Class A Warrant in connection with any transfer, exchange, or
replacement as provided in this Section 7, this Class A Warrant shall be
promptly canceled by the Company.  The Company shall pay all taxes
(other than securities transfer taxes) and all other expenses (other than legal
expenses, if any, incurred by the Holder) and charges payable in connection with
the preparation, execution, and delivery of Class A Warrants pursuant to this
Section 7.

     

    e.           Register.  The Company shall
maintain, at its principal executive offices (or such other office or agency of
the Company as it may designate by notice to the Holder), a register for this
Class A Warrant, in which the Company shall record the name and address of the
person in whose name this Class A Warrant has been issued, as well as the name
and address of each transferee and each prior owner of this Class A
Warrant.

    
      
         

      

      
        8

        
          

        

      

      
         

      

    

    f.           Exercise
or Transfer Without Registration.  If, at the time
of the surrender of this Class A Warrant in connection with any exercise,
transfer, or exchange of this Class A Warrant, this Class A Warrant (or, in the
case of any exercise, the Class A Warrant Shares issuable hereunder), shall not
be registered under the Securities Act and under applicable state securities or
blue sky laws, the Company may require, as a condition of allowing such
exercise, transfer, or exchange, (i) that the Holder furnish to the Company a
written opinion of counsel, which opinion and counsel are acceptable to the
Company, to the effect that such exercise, transfer, or exchange may be made
without registration under the Securities Act and under applicable state
securities or blue sky laws, (ii) that the Holder execute and deliver to the
Company an investment letter in form and substance reasonably acceptable to the
Company and (iii) that the transferee be an “accredited investor” as defined in
Rule 501(a) promulgated under the Securities Act; provided, however, that no such
opinion, letter or status as an “accredited investor” shall be required in
connection with a transfer pursuant to Rule 144 under the Securities
Act.  The first Holder of this Class A Warrant, by taking and holding
the same, represents to the Company that such Holder is acquiring this Class A
Warrant for investment and not with a view to the distribution
thereof.

     

    8.          Registration
Rights.  The initial
Holder of this Class A Warrant (and certain assignees thereof) is entitled to
the benefit of such registration rights in respect of the Class A Warrant Shares
as are set forth in the Registration Rights Agreement dated as of June 1, 2009
by and among the Company and the investors listed on the execution page thereof
(the “Registration Rights
Agreement”).

     

    9.          Redemption.  In the event that
the Company shall have deployed its MoqiZone WiMax Network in not less than 700
Internet cafés in the PRC (a “Redemption Event”), the
Company shall thereafter have the right (but not the obligation), upon thirty
(30) days prior written notice to the Holder (the “Redemption Notice”), to redeem
all and not less than all of the Class A Warrants for a price of $0.001 per
Class A Warrant Share; provided, that any Holder may elect to exercise this
Warrant at any time prior to the date fixed for redemption in such Redemption
Notice.

     

    10.       Notices. All notices, requests,
and other communications required or permitted to be given or delivered
hereunder to the Holder of this Class A Warrant shall be in writing, and shall
be (i) personally delivered, (ii) sent by certified or registered mail or by
recognized overnight mail courier, postage prepaid and addressed or (iii) upon
hand delivery by telex (with correct answer back received), telecopy, e-mail or
facsimile at the address or number designated below (if delivered on a business
day during normal business hours where such notice is to be received), or the
first business day following such delivery (if delivered other than on a
business day during normal business hours where such notice is to be received),
to the Holder at the address shown for the Holder as provided in the Securities
Purchase Agreement, or at such other address as shall have been furnished to the
Company by notice from the Holder.  All notices, requests, and other
communications required or permitted to be given or delivered hereunder to the
Company shall be addressed to ______________________________________, with a
copy to [  ], or at such other address as shall have been furnished to
the Holder of this Class A Warrant by notice from the Company.  All
notices, requests, and other communications shall be deemed to have been given
either at the time of the receipt thereof by the person entitled to receive such
notice at the address of such person for purposes of this Section 10, or, if
mailed by registered or certified mail or with a recognized overnight mail
courier upon deposit with the United States Post Office or such overnight mail
courier, if postage is prepaid and the mailing is properly addressed, as the
case may be.

    
      
         

      

      
        9

        
          

        

      

      
         

      

    

    11.       Governing
Law.  This Class A Warrant shall be enforced, governed by and
construed in accordance with the laws of the State of New York applicable to
agreements made and to be performed entirely within such state, without regard
to the principles of conflict of laws.  The Company hereby submits to
the exclusive jurisdiction of the United States federal courts and New York
state courts located in New York, New York with respect to any dispute arising
under this Class A Warrant, the agreements entered into in connection herewith
or the transactions contemplated hereby or thereby.  The Company
irrevocably waives the defense of an inconvenient forum to the maintenance of
such suit or proceeding.  The Company further agrees that service of
process upon it mailed by first class mail shall be deemed in every respect
effective service of process upon the Company in any such suit or
proceeding.  Nothing herein shall affect the Holder’s right to serve
process in any other manner permitted by law.  A final non-appealable
judgment in any such suit or proceeding shall be conclusive and may be enforced
in other jurisdictions by suit on such judgment or in any other lawful
manner.

     

    12.      Miscellaneous.

     

    a.           Amendments.  This Class A
Warrant and any provision hereof may be amended by an instrument in writing
signed by the Company and holders of a majority of the then-unexercised Class A
Warrant Shares underlying the Class A Warrants issued pursuant to the Securities
Purchase Agreement.  All such amendments shall be binding to all
Holders of Class A Warrants issued pursuant to the Securities Purchase
Agreement.

     

    b.           Descriptive
Headings.  The descriptive
headings of the several sections of this Class A Warrant are inserted for
purposes of reference only, and shall not affect the meaning or construction of
any of the provisions hereof.

     

    c.           Remedies.  The
Company acknowledges that a breach by it of its obligations hereunder will cause
irreparable harm to the Holder, by vitiating the intent and purpose of the
transaction contemplated hereby.  Accordingly, the Company
acknowledges that the remedy at law for a breach of its obligations under this
Class A Warrant will be inadequate and agrees, in the event of a breach or
threatened breach by the Company of the provisions of this Class A Warrant, that
the Holder shall be entitled, in addition to all other available remedies at law
or in equity, and in addition to the penalties assessable herein, to an
injunction or injunctions restraining, preventing or curing any breach of this
Class A Warrant and to enforce specifically the terms and provisions thereof,
without the necessity of showing economic loss and without any bond or other
security being required.

     

    d.           Facsimile
Signature.  This Class A Warrant may be issued to the Holder
containing a facsimile signature of Lawrence Cheung, the Chief Executive Officer
of the Company; which facsimile signature the Company acknowledges and agrees
shall have the same validity and enforceability as those the same were a ribbon
original signature.

    

    [remainder of page intentionally left
blank]

    
      
         

      

      
        10

        
          

        

      

      
         

      

    

    

    IN WITNESS WHEREOF, the
Company has caused this Class A Warrant to be signed by its duly authorized
officer.

    

    
      
        
          
            	
                    TRESTLE HOLDING, INC.

                  
	
                    (to
      be renamed MoqiZone Holding Corporation)

                  
	 
      	 
      
	
                    By:

                  	
                     

                  
	
                    Name:

                  	 
      
	
                    Title:

                  	 
      

          

        

      

    

    

    Dated as
of ___________ __, 2009

    
      
         

      

      
         

        
          

        

      

      
         

      

    

    

    FORM
OF EXERCISE AGREEMENT

    

    Dated:  ________ __,
20__

    

    To:                      

    [  ]

    

    
      	
               
      

            	
              1.

            	
              The
      undersigned, pursuant to the provisions set forth in the within Class A
      Warrant, hereby agrees to purchase ________ shares of Common Stock covered
      by such Class A Warrant, and makes payment herewith in full therefor at
      the price per share provided by such Class A Warrant in cash or by
      certified or official bank check or by wired funds in the amount of
      $_______.

            

    

    

    
      	
               
      

            	
              2.

            	
              Regulation S. If the
      Holder received the Warrant pursuant to Regulation
    S:

            

    

    

    (a) I,
[                                           ],
the Holder of the Warrant certify that I am not a U.S. person and am not
exercising the Warrant on behalf of a U.S. Person;

    

    (b)
Attached hereto is a written opinion of counsel to the effect that the Warrant
and the Warrant Shares to be delivered upon the exercise of the Warrant have
been registered under the Act or are exempt from registration thereunder
pursuant to Regulation S promulgated under the Act.

    

    Please
issue a certificate or certificates for such shares of Common Stock in the name
of and pay any cash for any fractional share to:

     

    
      
        
          
            
              
                
                  
                    
                      	
                              Name:

                            
	 
      
	 
	
                              Signature:

                            
	 
      
	
                              Address:

                            
	 
      
	
                               

                            

                    

                  

                

              

            

          

        

      

    

    

    
      	
               
      

            	
              Note:

            	
              The
      above signature should correspond exactly with the name on the face of the
      within Class A Warrant, if
applicable.

            

    

    

    and, if
said number of shares of Common Stock shall not be all the shares purchasable
under the within Class A Warrant, a new Class A Warrant is to be issued in the
name of said undersigned covering the balance of the shares purchasable
thereunder less any fraction of a share paid in cash.

    
      
         

      

      
         

        
          

        

      

      
         

      

    

    

    FORM
OF ASSIGNMENT

    

    FOR VALUE RECEIVED, the
undersigned hereby sells, assigns, and transfers all the rights of the
undersigned under the within Class A Warrant, with respect to the number of
shares of Common Stock covered thereby set forth herein below, to:

    

    Name of
Assignee                                                                Address                                                                No of
Shares

     

    
 

    , and
hereby irrevocably constitutes and appoints ___________________________________
as agent and attorney-in-fact to transfer said Class A Warrant on the books of
the within-named corporation, with full power of substitution in the
premises.

    Dated:                      ________
__, 20__

    

    In the
presence
of:          

                                                 _______________________________________

     

     

    
      
        
          
            
              
                
                  
                    
                      
                        
                          	
                                  Name:

                                	
                                   

                                
	 
      	 
      
	
                                  Signature:

                                	
                                   

                                
	
                                  Title
      of Signing Officer or Agent (if any):

                                
	 
      	
                                   

                                
	
                                  Address:

                                	
                                   

                                
	 
      	
                                   

                                
	 
      	
                                  Note:

                                	
                                  The
      above signature should correspond exactly with the name on the face of the
      within Class A Warrant, if
applicable.

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