Document:

EXCHANGE AGREEMENT

        THIS EXCHANGE AGREEMENT (the "Agreement") is made this 23rd day of
December, 1999 by and between The Hartcourt Companies Inc., a Utah corporation
("Hartcourt") and GoCall Inc., a Delaware corporation ("GoCall")

        WHEREAS, GoCall and Hartcourt wish to form a strategic alliance for
the development of certain common interests of the two corporations, including
but not limited to the development of GoCall's internet related
development-stage businesses and software; and

        WHEREAS, Hartcourt and GoCall wish to effect the proposed strategic
alliance by exchanging shares of the two respective corporations' common stock.

        IN CONSIDERATION of the mutual promises contained herein, the benefits
to be derived by each party hereunder and other good and valuable consideration,
the receipt and sufficiency of which are hereby expressly acknowledged,
Hartcourt and GoCall agree as follows:

1.      EXCHANGE

        On the basis of the representations and warranties herein contained,
        subject to the terms and conditions set forth herein, GoCall agrees to
        exchange One Million (l,000,000) shares of its Convertible Preferred
        Stock (par value @ $5.00) stock (the GoCall Shares") exercisable to 10
        shares of GoCall Common Stock (Restricted under Rule 144 for 12 months)
        for each share of Convertible Preferred Shares so exchanged for all of
        the shares as set forth in Schedule "A" attached hereto and made a part
        hereof ("Hartcourt Shares").

2.      CLOSING

        A.   CLOSING DATE. The closing of the exchange contemplated by this
             Agreement (the "Closing") shall occur upon the transfer of the
             GoCall Shares to Hartcourt (the Transfer Date"), on December 29,
             1999 at 4:00 PM of that day at the offices of Hartcourt. At the
             Closing, Hartcourt shall deliver its consideration to GoCall and
             GoCall shall deliver its consideration to Hartcourt in a
             simultaneous transaction. Notwithstanding the date of Closing, the
             Effective Date shall be December 29, 1999.

3.      REPRESENTATIONS AND WARRANTIES OF GOCALL

        GoCall hereby represents and warrants to Hartcourt that:

        A.   ORGANIZATION. GoCall is a corporation validly existing and in
             good standing under the laws of Delaware with the power and
             authority to carry on its business as now being conducted. The
             execution and delivery of this Agreement and the consummation of

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             laws of Delaware. with the power and authority to carry on its
             business as now being conducted. The execution and delivery of this
             Agreement and the consummation of the transaction contemplated in
             this Agreement have been, or will be prior to Closing, duly
             authorized by all requisite corporate action on the part of GoCall,
             including but not limited to Board of Director Resolutions
             ratifying this transaction and that this Agreement has been duly
             executed and delivered by GoCall and constitutes a binding and
             enforceable obligation of GoCall. On Closing, a single five (5)
             member Board of Directors shall be formed having three (3) members
             appointed by Hartcourt and two (2) members appointed by GoCall.

        B.   THIRD PARTY CONSENT. No authorization, consent, or approval of,
             or registration or filing with, any governmental authority or any
             other person is required to be obtained or made by GoCall in
             connection with the execution, delivery or performance of this
             Agreement, or if required, GoCall has or will obtain same prior to
             Closing;

        C.   LITIGATION. GoCall is not a defendant or a plaintiff against
             whom a claim has been made or reduced to judgement in any
             litigation or proceedings before any local, state or U.S. foreign
             government, or any department, board, body or agency thereof, which
             could result in a claim against the GoCall Shares or any of
             GoCall's assets;

        D.   STATUS OF GOCALL SHARES. The GoCall Shares will be validly
             issued by GoCall and it shall deliver same to Hartcourt at Closing,
             as well as resolutions of GoCall's Board of Directors wherein
             GoCall agrees not to issue or demand a "stop transfer" be put into
             effect or against any of the GoCall Shares, or otherwise attempt to
             restrict the transfer or exchange of the GoCall Shares issued to
             Hartcourt hereunder. Further. GoCall represents that it has not
             created any option, security interest or encumbrance upon the
             GoCall Shares that would give rise to any claims by third parties
             or otherwise conflict with or preclude the exchange as contemplated
             herein; and

        E.   AUTHORITY. This Agreement has been duly executed by GoCall, and
             the execution and performance of this Agreement will not violate,
             or result in a breach of, or constitute a default in any agreement,
             instrument, judgement, order or decree to which GoCall is a party
             or to which the GoCall Shares may be subject.

4.      REPRESENTATIONS AND WARRANTIES OF HARTCOURT

        Hartcourt hereby represents and warrants to GoCall that:

        A.   ORGANIZATION. Hartcourt is a corporation validly existing and in
             good standing under the laws of Utah with the power and authority
             to carry on its business now being conducted. The execution and
             delivery of this Agreement and the consummation of the transaction
             contemplated in this Agreement have been, or will be prior to
             Closing, duly authorized by all requisite corporate action on the
             part of Hartcourt. This Agreement has been duly executed and
             delivered by Hartcourt and constitutes a binding, and enforceable
             obligation of Hartcourt;

        B.   THIRD PARTY CONSENT. No authorization, consent, or approval of,
             or registration or filing with, any governmental authority or any
             other person is required to be obtained or made by Hartcourt in
             connection with the execution, delivery or performance of this
             Agreement, or if required, GoCall has or will obtain same prior to
             Closing;

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        C.   LITIGATION. Hartcourt is not a defendant or a plaintiff against
             whom a counterclaim has been made or reduced to judgement in any
             litigation or proceedings before any local, state U.S. or foreign
             government, or any department, board, body or agency thereof, which
             could result in a claim against Hartcourt enacting this
             transaction.

        D.   STATUS OF HARTCOURT OWNED SHARES. The Shares constituting
             Hartcourt's consideration Schedule "A" annexed hereto and
             incorporated herein by reference will be validly endorsed by
             Hartcourt or released to GoCall by written authorization duly
             executed by Hartcourt which it shall deliver to GoCall at Closing.
             Further, Hartcourt represents that it has not created any option,
             security interest or encumbrance upon the Shares that would give
             rise to any claims by third parties or otherwise conflict with or
             preclude the exchange as contemplated herein; and Hartcourt has
             never been an affiliate of any of the companies in Schedule "A."

        E.   AUTHORITY. This Agreement has been duly executed by Hartcourt,
             and the execution and performance of this Agreement will not
             violate, or result in a breach of, or constitute a default in any
             agreement, instrument, judgement, order or decree to which
             Hartcourt is a party or to which the Hartcourt Shares may be
             subject.

5.      CONDITIONS PRECEDENT TO OBLIGATIONS OF HARTCOURT AND GOCALL

        All obligations of Hartcourt and GoCall under this Agreement are
        subject to the fulfillment, prior to or as of the Closing Date, of
        each of the following conditions:

        A.   TRANSFER AND DELIVERY OF THE SECURITIES. Hartcourt shall have
             endorsed or assigned or delivered the Shares to GoCall and GoCall
             shall have issued and delivered the GoCall Shares to Hartcourt
             pursuant to this Agreement.

        B.   ACCEPTANCE OF DOCUMENTS. All instruments and documents delivered
             to the parties hereto, pursuant to the provisions of this
             Agreement, and the terms and conditions of the agreement(s) shall
             be satisfactory to Hartcourt and GoCall.

6.      AVAILABILITY OF INFORMATION

        Hartcourt and GoCall each represent that, by virtue of their
        respective business activities and economic bargaining power or
        otherwise, they have been able to conduct their own due diligence and
        have had access to or have been furnished with, prior to or
        concurrently with the execution hereof, the information which they
        consider to be adequate to make a decision to exchange the GoCall
        Shares for the Hartcourt owned Shares.

7.      PRIVATE TRANSACTION

        A.   PRIVATE OFFERING. GoCall and Hartcourt each understand that the
             exchange contemplated herein constitutes a private, arms-length
             transaction between the parties without the use or reliance upon a
             distribution or securities underwriter.

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        B.   PURCHASE FOR OWN ACCOUNT. Neither GoCall nor Hartcourt are
             underwriters of, or dealers in, the respective securities to be
             exchanged hereunder, and neither party is acting as such or
             participating pursuant to a contractual agreement, in the
             distribution of such securities.

        C.   INVESTMENT RISK. Hartcourt and GoCall acknowledge the exchange
             contemplated by this Agreement may involve a high degree of
             financial risk, including the risk that one or both parties may
             lose its entire investment.

        D.   ACCESS TO INFORMATION. GoCall and Hartcourt and their advisors
             each have been afforded the opportunity to discuss the transaction
             contemplated herein with legal and accounting professionals, and to
             examine and evaluate the financial impact of such exchange.

        E.   This Agreement has been duly executed by Hartcourt, and the
             execution and performance of this Agreement will not violate, or
             result in a breach of, or constitute a default in any agreement,
             instrument, judgement, order or decree to which Hartcourt is a
             party or to which the Hartcourt Shares may be subject.

8.      TERMINATION

        This Agreement may be terminated at anytime prior to the date of
        Closing by either party if (a) there shall be any actual or threatened
        action or proceeding by or before any court or any other governmental
        body which shall seek to restrain, prohibit, or invalidate the
        transaction contemplated by this Agreement, and which, in the judgment
        of such party giving notice to terminate and based upon the advice of
        legal counsel, makes it inadvisable to proceed with the transaction
        contemplated by this Agreement.

9.      MISCELLANEOUS

        A.   AUTHORITY. The officers of Hartcourt and GoCalI executing this
             Agreement are duly authorized to do so and each party has taken all
             action required by law or otherwise to properly and legally execute
             this Agreement.

        B.   NOTICES. Any notice under this Agreement shall be deemed to have
             been sufficiently given if sent by registered or certified mail,
             postage prepaid, addressed as follows:

             To GoCall Inc.      GoCall Inc.
                                 15 Queen Street East
                                 Cambridge, Ontario, Canada N3C 2A7
                                 Telephone: (519) 651-2121
                                 Facsimile: (519) 651-0457

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             To Hartcourt:       The Hartcourt Companies Inc.
                                 1196 E. Willow St.
                                 Long Beach, CA 90806
                                 Telephone: (562) 426-9796
                                 Facsimile: (562) 426-8896

             or to any other address which may hereafter be designated by
             either party by notice given in such manner. All notices
             shall be deemed to have been given as of the date of receipt.

        C.   ENTIRE AGREEMENT. This Agreement sets forth the entire
             understanding between the parties hereto and no other prior written
             or oral statement or agreement shall be recognized or enforced.

        D.   SEVERABILITY. If a court of competent jurisdiction determines
             that any clause or provision of this Agreement is invalid, illegal
             or unenforceable, the other clauses and provisions of the Agreement
             shall remain in full force and effect and the clauses and
             provisions which are determined to be void, illegal or
             unenforceable shall be limited so that they shall remain in effect
             to the extent permissible by law.

        E.   None of the parties hereto may assign this Agreement without the
             express written consent of the other parties and any approved
             assignment shall be binding on and inure to the benefit of such
             successor or, in the event of death or incapacity on assignor s
             heirs, executors, administrators and successors.

        F.   APPLICABLE LAW. This Agreement bas been negotiated and is being
             contracted for in the State of California, and it shall be governed
             by the laws of California, County of Los Angeles, notwithstanding
             any conflict-of-law provision to the contrary.

        G.   LITIGATION. If any legal action or other preceding
             (non-exclusively including arbitration) is brought for the
             enforcement of or to declare any right or obligation under this
             Agreement or as a result of a breach, default or misrepresentation
             in connection with any of the provisions of this Agreement, or
             otherwise because of a dispute among the parties hereto, the
             prevailing party will be entitled to recover actual attorney's fees
             (including for appeals and collection) and other expenses incurred
             in such action or proceeding, in addition to any other relief to
             which such party may be entitled.

        H.   NO THIRD PARTY BENEFICIARY. Nothing in this Agreement, expressed
             or implied, is intended to confer upon any person, other than the
             parties hereto and their successors, any rights or remedies under
             or by reason of this Agreement, unless this Agreement specifically
             states such intent.

        I.   It is understood and agreed that this Agreement may be executed
             in any number of identical counterparts, each of which may be
             deemed an original for all purposes.

        J.   FURTHER ASSURANCES. At any time, and from time to time after the
             Closing, each party hereto will execute such additional instruments
             and take such action as may be reasonably requested by the other
             party to confirm or perfect title to the securities being exchanged
             pursuant to this Agreement, or otherwise to carry out the intent
             and purposes of this Agreement.

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        K.   BROKER'S OR FINDER'S FEE: EXPENSES. GoCall and Hartcourt each
             warrant that they have not incurred any liability, contingent or
             otherwise, for brokers' or finders fees or commissions relating to
             this Agreement for which the other party shall have responsibility.
             Except as otherwise provided herein, all fees, costs and expenses
             incurred by either party relating to this Agreement shall be paid
             by the party incurring same.

        L.   AMENDMENT OR WAIVER. Every right and remedy provided herein
             shall be cumulative with every other right and remedy, whether
             conferred herein, at law, or in equity, and may be enforced
             concurrently herewith, and no waiver by any party of the
             performance of any obligation by the other shall be construed as a
             waiver of the same or any other default then, theretofore, or
             thereafter occurring or existing. At any time prior to Closing,
             this Agreement may be amended by a writing signed by all parties
             hereto.

        M.   HEADINGS. The section and subsection headings in this Agreement
             are inserted for convenience only and shall not affect in any way
             the meaning or interpretation of this Agreement.

        N.   FACSIMILE. A facsimile, telecopy or other reproduction of this
             instrument may be executed by one or more parties hereto and such
             executed copy may be delivered by facsimile or similar
             instantaneous electronic transmission device pursuant to which the
             signature of or on behalf of such party can be seen, and such
             execution and delivery shall be considered valid, binding and
             effective for all purposes. At the request of any party hereto, all
             parties agree to execute an original of this instrument as well as
             any facsimile, telecopy or other reproduction hereof.

        O.   ANNOUNCEMENTS. Except as required by law, no announcements shall
             be made by either party with respect to the receipt or acceptance
             of this agreement, or the transaction proposed herein without the
             prior written permission of the other.

        IN WITNESS WHEREOF, the parties hereto have caused this Agreement
to be executed the day and year first above written.

"GoCall"                                           "Hartcourt"
GoCall, Inc.                                       The Hartcourt Companies, Inc.
By:                                                By:

/s/ Michael Ruge                                   /s/ Alan V. Phan
-------------------------                          -------------------------
Michael Ruge, CEO                                  Alan V. Phan, Chairman

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                                  SCHEDULE "A"

1.      2,850,000 Common Stock Shares in Dega Technology, Inc.,
        symbol: DEGA     500000 Restricted, Balance without legend

2.      2,400,000 Preferred Shares in NuOasis Resorts, Inc.
        symbol: NUOA     Without legend

3.      1,500,000 Common Stock Shares in Oasis Resorts International Inc.
        symbol: OAIS     Without legend

4.      192,000 Common Stock Shares in Electronic Components & Systems, Inc
        symbol: ECSX     Without legend

AS TO ALL OF THE ABOVE SHARES, HARTCOURT REPRESENTS AND WARRANTS THAT IT IS
RELYING UPON THE REPRESENTATIONS OF ITS PREDECESSOR IN TITLE CONCERNING
"LEGENDS" AND IT CANNOT ITSELF CONFIRM THIS INFORMATION NOR IS IT HEREIN
REPRESENTING AS TO THE TRUTH OR VALIDITY OF SUCH CLAIMS.WALL STREET MARKETING GROUP INC.
                    PUBLIC RELATIONS & CONSULTING AGREEMENT

This AGREEMENT made this 27th of December, 1999 and between GO CALL INC..
(hereinafter "Client") and WALL STREET MARKETING GROUP INC. (hereinafter
"Consultant").

WITNESSETH

In consideration of the mutual promises hereinafter made by each to the other,
Client and Consultant agree as follows:

1. CONTRACT SERVICES

Client hereby retains Consultant to represent, advise, counsel, and assist
Client in public relations, public appearances and the marketing of client's
company. Client additionally hereby retains Consultant to disseminate
information from Client to licensed members of the securities industry. Services
performed by Consultant do not relate to NASD activities or financing.

2. COMPENSATION FOR SERVICES

Client agrees to pay Consultant one hundred thousand restricted (1 year) shares
and grant Consultant options on GOCA non-restricted stock to be exercised by
January 1, 2001:

               1) 100,000 shares priced at $.75 per share;
               2) 100,000 shares priced at $1.00 per share;
               3) 100,000 shares priced at $4.00 per share;

3. PAYMENT OF CONSULTANT'S FEE

Consultant shall receive the restricted shares upon engagement.

4. DISCLAIMER OF LIABILITY

Consultant makes no guarantees to any results including but not limited to
trading activity, volume, or stock price with respect to the timing, place,
manner or fashion in which public relations and consulting services are to be
conducted.

<PAGE>

5. NOTICES

All notices hereunder shall be effective if sent by certified mail, postage
prepaid to the following addresses.

If to the Consultant:              WALL STREET MARKETING GROUP INC.
                                   2375 F. Tropicana Suite 757
                                   Las Vegas, NV 89119

If to Client:                      Go Call Inc.
                                   15 Queen St. E
                                   Cambridge, Ont. N3C-2A7

6. ENTIRE AGREEMENT

This Agreement, sets forth the entire agreement between the parties hereto and
cannot be amended, modified or changed orally.

7. FILING

This contract is signed in duplicate. Consultant agrees to deliver one (1) copy
to the Client within five (5) days of its execution; and retain one (1) copy for
their files.

8. TERM

The term of this Agreement is for six months and shall begin on the date hereof
and shall continue until June 27th, 2000.

9. LAW

This agreement is governed and construed under the laws of the state of Nevada
and any action brought by either party to enforce or interpret this agreement
shall be brought in an appropriate court in the state of Nevada.

IN WITNESS WHEREOF, the parties hereto have hereunder signed their names as
hereinafter set forth.

By: /s/ Mark Taggatz                         By: /s/ Michael Ruge
   ------------------------------               ----------------------------
    Mark Taggatz/ President                     Michael Ruge/CEO
    Wall Street Marketing Group Inc.            Go Call Inc.

    12/27/99                                     Dec 29/99
   ------------------------------               ----------------------------
   (Date)                                       (Date)

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