Document:

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                                                                     Exhibit 4.9

                                                             English Translation

                        SOLARFUN POWER HOLDINGS CO., LTD.

                     THE FIRST AMENDMENT TO LOCKUP AGREEMENT

This First Amendment to Lockup Agreement (this "AMENDMENT"), dated as of
2007, is made to the Lockup Agreement dated as of June 20, 2006 by and among
Solarfun Power Holdings Co., Ltd., Mr. Lu Yonghua, Mr. Wang Hanfei, Mr. Cui
Rongqiang, Mr. Gu Yongliang, Ms. Yu Haijuan, Mr. Wang Yuting, Mr. Cao Min and
Mr. Tong Xingxue (the "AGREEMENT"). Capitalized terms used and not defined in
this Amendment shall have the same meanings assigned to them in the Agreement.

                                    RECITALS

Whereas, pursuant to Section D.(7) of the Agreement, the parties desire to amend
the Agreement as set forth in this Amendment.

Now, Therefore, in consideration of the rights and obligations of the parties
contained herein and for other good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, and intending to be legally bound,
the parties to the Agreement agree as follows:

1.   Section B.(1) of the Agreement is hereby amended and restated in its
     entirety to read as follows:

     "(1) Within one (1) year, in case of Mr. Lu Yonghua, and two (2) years, in
     case of Mr. Wang Hanfei (in each case, including Lockup Period), as from
     the date of the IPO, neither Mr. Lu nor Mr. Wang may transfer any of his
     shares in the Company by any of the arrangements described in Section A
     above, whether through Yonghua Solar Power Investment Holding Ltd. or WHF
     Investment Co., Ltd.. After the expiry of such three (3) years, each of Mr.
     Wang and Mr. Lu may transfer his shares in the Company under the rules and
     regulations of the US Securities and Exchange Commission (the "SEC")
     subject to his performance of the information disclosure obligations
     relating thereto."

2.   The first paragraph of Section B.(2) of the Agreement is hereby amended and
     restated in its entirety to read as follows:

     "(2) After the expiry of the Lockup Period, each of Mr. Gu Yongliang, Mr.
     Cui Rongqiang, Mr. Wang Yuting and Mr. Tong Xingxue may transfer his shares
     in the Company by any of the arrangements described in Section A above,
     through Yongliang Solar Power Investment Holding Ltd., Yongqiang Solar
     Power Investment Holding Ltd., YongGuan Solar Power Investment Holding Ltd.
     and YongXing Solar Power Investment Holding Ltd., respectively; provided,
     however, that the aggregate of the shares so transferred during any year
     after expiry of the Lockup Period may not exceed 1/3 of his total number of
     record shares at the date of the IPO subject to any share split or
     combination of the Company ("QUOTA"), or in other words, the total number
     of the shares held by any such Shareholder may not be completely
     transferred at least after three (3) years after the IPO. Any portion of
     any Quota not used in previous years may be added to the Quota for the
     current year."

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                                                             English Translation

3.   The first paragraph of Section B.(3) of the Agreement is hereby amended and
     restated in its entirety to read as follows:

     "(3) After the expiry of the Lockup Period, Mr. Cao Min and Ms. Yu Haijuan
     may transfer his/her shares in the Company by any of the arrangements
     described in Section A above through Forever-brightness Investments Limited
     and Yongfa Solar Power Investment Holding Ltd., respectively; provided,
     however, that during the first year after the expiry of the Lockup Period
     he/she can only transfer 50% of his/her shares in the Company and the
     remaining 50% of the shares may not be transferred until after the first
     anniversary of the expiry date of the Lockup Period."

4.   This Amendment constitutes the entire agreement of the parties hereto with
     respect to the subject matter hereof and supersedes all prior agreements
     and undertakings, both written and oral, among the parties with respect to
     the subject matter hereof. Except as amended by this Amendment, the
     Agreement shall remain in full force and effect.

5.   If any term or other provision in this Amendment shall be held invalid,
     illegal or unenforceable under any applicable law or public policy, all
     other terms and provisions of this Amendment shall nevertheless remain in
     full force and effect so long as the economic or legal substance of the
     transaction contemplated hereby is not affected in any manner materially
     adverse to either party hereto. Upon such determination that any term or
     other provision in this Amendment is invalid, illegal or unenforceable, the
     parties shall negotiate in good faith to amend this Amendment so as to
     effect the original intent of the parties as closely as possible in an
     acceptable manner in order that the transaction contemplated hereby is
     consummated as originally contemplated to the greatest extent possible.

6.   This Amendment shall be interpreted in Chinese.

7.   This Amendment is made under the laws of the State of New York, the United
     States of America. Anything set forth herein shall be governed by and
     construed in accordance with the laws of the State of New York, the United
     States.

8.   This Amendment may be executed in counterparts. Each such counterpart shall
     be deemed an original, but all of which taken together shall constitute one
     and the same agreement.

IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be executed
on the date first above written by their respective authorized representatives.

                            [Signature Page Follows]

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                                                             English Translation

                                LETTER OF CONSENT

This Letter of Consent is prepared in connection with the Lockup Agreement dated
as of June 20, 2006 by and among Solarfun Power Holdings Co., Ltd., Mr. Lu
Yonghua, Mr. Wang Hanfei, Mr. Cui Rongqiang, Mr. Gu Yongliang, Ms. Yu Haijuan,
Mr. Wang Yuting, Mr. Cao Min and Mr. Tong Xingxue (the "AGREEMENT").

Pursuant to Section D.(7) of the Agreement, we hereby give our express consent
to amend the Agreement as follows:

1.   The original provision of Section B.(1) "Within three (3) years (including
     the Lockup Period) as from the date of the IPO, neither Mr. Lu Yonghua nor
     Mr. Wang Hanfei may transfer any of his shares in the Company by any of the
     arrangements described in Section A above, whether through Yonghua Solar
     Power Investment Holding Ltd. or WHF Investment Co., Ltd.. After the expiry
     of such three (3) years, each of Mr. Wang and Mr. Lu may transfer his
     shares in the Company under the rules and regulations of the US Securities
     and Exchange Commission (the "SEC") subject to his performance of the
     information disclosure obligations relating thereto" shall be amended to
     read as follows:

     "(1) WITHIN ONE (1) YEAR, IN CASE OF MR. LU YONGHUA, AND TWO (2) YEARS, IN
     CASE OF MR. WANG HANFEI (IN EACH CASE, INCLUDING LOCKUP PERIOD), AS FROM
     THE DATE OF THE IPO, NEITHER MR. LU NOR MR. WANG MAY TRANSFER ANY OF HIS
     SHARES IN THE COMPANY BY ANY OF THE ARRANGEMENTS DESCRIBED IN SECTION A
     ABOVE, WHETHER THROUGH YONGHUA SOLAR POWER INVESTMENT HOLDING LTD. OR WHF
     INVESTMENT CO., LTD.. AFTER THE EXPIRY OF SUCH THREE (3) YEARS, EACH OF MR.
     WANG AND MR. LU MAY TRANSFER HIS SHARES IN THE COMPANY UNDER THE RULES AND
     REGULATIONS OF THE US SECURITIES AND EXCHANGE COMMISSION (THE "SEC")
     SUBJECT TO HIS PERFORMANCE OF THE INFORMATION DISCLOSURE OBLIGATIONS
     RELATING THERETO."

2.   The original provision of the first paragraph of Section B. (2) "(2) After
     the expiry of the Lockup Period, each of Mr. Gu Yongliang, Mr. Cui
     Rongqiang, Ms. Yu Haijuan, Mr. Wang Yuting and Mr. Tong Xingxue may
     transfer his/her shares in the Company by any of the arrangements described
     in Section A above, through Yongliang Solar Power Investment Holding Ltd.,
     Yongqiang Solar Power Investment Holding Ltd., Yongfa Solar Power
     Investment Holding Ltd., YongGuan Solar Power Investment Holding Ltd.,
     YongXing Solar Power Investment Holding Ltd. respectively; provided,
     however, that the aggregate of the shares so transferred during any year
     after expiry of the Lockup Period may not exceed 1/3 of his/her total
     number of record shares at the date of the IPO subject to any share split
     or combination of the Company ("QUOTA"), or in other words, the total
     number of the shares held by any such Shareholder may not be completely
     transferred at least after three (3) years after the IPO. Any portion of
     any Quota not used in previous years may be added to the Quota for the
     current year." shall be amended to read as follows:

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                                                             English Translation

     "(2) AFTER THE EXPIRY OF THE LOCKUP PERIOD, EACH OF MR. GU YONGLIANG, MR.
     CUI RONGQIANG, MR. WANG YUTING AND MR. TONG XINGXUE MAY TRANSFER HIS SHARES
     IN THE COMPANY BY ANY OF THE ARRANGEMENTS DESCRIBED IN SECTION A ABOVE,
     THROUGH YONGLIANG SOLAR POWER INVESTMENT HOLDING LTD., YONGQIANG SOLAR
     POWER INVESTMENT HOLDING LTD., YONGGUAN SOLAR POWER INVESTMENT HOLDING LTD.
     AND YONGXING SOLAR POWER INVESTMENT HOLDING LTD., RESPECTIVELY; PROVIDED,
     HOWEVER, THAT THE AGGREGATE OF THE SHARES SO TRANSFERRED DURING ANY YEAR
     AFTER EXPIRY OF THE LOCKUP PERIOD MAY NOT EXCEED 1/3 OF HIS TOTAL NUMBER OF
     RECORD SHARES AT THE DATE OF THE IPO SUBJECT TO ANY SHARE SPLIT OR
     COMBINATION OF THE COMPANY ("QUOTA"), OR IN OTHER WORDS, THE TOTAL NUMBER
     OF THE SHARES HELD BY ANY SUCH SHAREHOLDER MAY NOT BE COMPLETELY
     TRANSFERRED AT LEAST AFTER THREE (3) YEARS AFTER THE IPO. ANY PORTION OF
     ANY QUOTA NOT USED IN PREVIOUS YEARS MAY BE ADDED TO THE QUOTA FOR THE
     CURRENT YEAR."

3.   The original provision of the first paragraph of Section B. (3) "(3) After
     the expiry of the Lockup Period, Mr. Cao Min may transfer his shares in the
     Company by any of the arrangements described in Section A above through
     Forever-brightness Investments Limited; provided, however, that during the
     first year after the expiry of the Lockup Period he can only transfer 50%
     of his shares in the Company and the remaining 50% of the shares may not be
     transferred until after the first anniversary of the expiry date of the
     Lockup Period." shall be amended to read as follows:

     "(3) AFTER THE EXPIRY OF THE LOCKUP PERIOD, MR. CAO MIN AND MS. YU HAIJUAN
     MAY TRANSFER HIS/HER SHARES IN THE COMPANY BY ANY OF THE ARRANGEMENTS
     DESCRIBED IN SECTION A ABOVE THROUGH FOREVER-BRIGHTNESS INVESTMENTS LIMITED
     AND YONGFA SOLAR POWER INVESTMENT HOLDING LTD., RESPECTIVELY; PROVIDED,
     HOWEVER, THAT DURING THE FIRST YEAR AFTER THE EXPIRY OF THE LOCKUP PERIOD
     HE/SHE CAN ONLY TRANSFER 50% OF HIS/HER SHARES IN THE COMPANY AND THE
     REMAINING 50% OF THE SHARES MAY NOT BE TRANSFERRED UNTIL AFTER THE FIRST
     ANNIVERSARY OF THE EXPIRY DATE OF THE LOCKUP PERIOD."

Capitalized terms used and not defined in this Letter of Consent shall have the
same meanings assigned to them in the Agreement.

This Letter of Consent shall be interpreted in Chinese and be governed by the
laws of the State of New York, the United States of America.

IN WITNESS WHEREOF, the parties hereto have caused this Letter of Consent to be
executed as of 2007.

                            [Signature Page Follows]

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                                                             English Translation

By:   Lu Yonghua           [signature]
      ---------------------

      Name: Lu Yonghua

By:   Wang Hanfei         [signature]
      --------------------

      Name: Wang Hanfei

By:   Cui Rongqiang      [signature]
      -------------------

      Name: Cui Rongqiang

By:   Gu Yongliang        [signature]
      --------------------

      Name: Gu Yongliang

By:   Yu Haijuan            [signature]
      ----------------------

      Name: Yu Haijuan

By:   Wang Yuting         [signature]
      --------------------

      Name: Wang Yuting

By:   Cao Min                 [signature]
      ------------------------

      Name: Cao Min

By:   Tong Xingxue       [signature]
      -------------------

      Name: Tong Xingxue

                                       5<PAGE>
                                                                    Exhibit 4.10

                             Dated December 4, 2007

                          AMENDMENT TO LOCKUP AGREEMENT

[Linklaters LLP LOGO]

Linklaters LLP
1345 Avenue of the Americas
New York, NY 10105

Telephone (+1) 212 903 9000
Facsimile (+1) 212 903 9100

Ref

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Amendment to Lockup Agreement, dated as of December 4, 2007 (the "Amendment"),
is entered into by and among:

(1)  Mr. Lu Yonghua,

(2)  Mr. Wang Hanfei,

(3)  Mr. Cui Rongqiang,

(4)  Mr. Gu Yongliang,

(5)  Ms. Yu Haijuan,

(6)  Mr. Wang Yuting,

(7)  Mr. Cao Min,

(8)  Mr. Tong Xingxue (each a "Shareholder" and, collectively, the
     "Shareholders"), and

(9)  Good Energies Investments (Jersey) Limited, a Jersey company ("Good
     Energies").

Whereas:

(A)  Solarfun Power Holdings Co., Ltd., a company incorporated pursuant to the
     laws of the Cayman Islands, and the Shareholders entered into a Lockup
     Agreement, dated as of June 20, 2006 (the "Agreement");

(B)  In connection with the Stock Purchase Agreement, dated as of December 4
     2007 (the "Stock Purchase Agreement"), entered into by and among Good
     Energies and the sellers named therein, the Shareholders desire to amend
     the Agreement as set forth in this Amendment; and

(C)  Pursuant to Section D.(7) of the Agreement, the Shareholders hereby give
     their unanimous written consent to the adoption of the Amendment.

Now, Therefore, in consideration of the mutual promises and covenants set forth
below and for other good and valuable consideration, the receipt and sufficiency
of which is hereby acknowledged, and intending to be legally bound, the parties
hereto agree as follows:

1.   Capitalized terms used and not defined in this Amendment shall have the
     same meanings assigned to them in the Agreement. Any terms of the Agreement
     in conflict or otherwise inconsistent with the Amendment are hereby
     superseded and replaced by the terms of the Amendment.

2.   The Shareholders hereby agree that the provisions of the Agreement
     including without limitation any provision regarding Share Transfer shall
     not apply to any Share Transfer made or proposed to be made by a
     Shareholder to Good Energies or any Affiliate of Good Energies.

3.   The Shareholders hereby agree that Section (B).1 of the Agreement shall not
     apply to any Share Transfer made by Mr. Yonghua Lu or any holding company
     or other intermediate entity through which a Shareholder holds his shares
     which is permissible pursuant to the terms of the Stock Purchase Agreement

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4.   As used herein, the term "Affiliate" means with respect to any Person, any
     other Person that controls, is controlled by, or is under common control
     with such Person. The term "control", as used with respect to any Person,
     means the power to direct or cause the direction of the management and
     policies of such Person, directly or indirectly, whether through the
     ownership of voting securities, by contract or otherwise. "Controlled" and
     "controlling" have meanings correlative to the foregoing. The term "Person"
     means any individual, corporation, limited liability company, limited or
     general partnership, joint venture, association, joint-stock company,
     trust, unincorporated organization or other entity, including but not
     limited to any government, agency or political subdivision thereof, or any
     group comprised of two or more of the foregoing.

5.   The Agreement and this Amendment may only be amended by an instrument in
     writing signed by all of the Shareholders and Good Energies.

6.   The Agreement is only amended as specifically provided in this Amendment
     and the remainder of the Agreement shall remain in full force and effect as
     written.

        [The remainder of this page has been intentionally left blank.]

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In Witness Whereof, the parties have duly executed this Amendment as of the date
first above written.

By   /s/ Lu Yonghua
     ---------------------------------------
     Name: Mr. Lu Yonghua
     Title:

By   /s/ Wang Hanfei
     ---------------------------------------
     Name: Mr. Wang Hanfei
     Title:

By   /s/ Cui Rongqiang
     ---------------------------------------
     Name: Mr. Cui Rongqiang
     Title:

By   /s/ Gu Yongliang
     ---------------------------------------
     Name: Mr. Gu Yongliang
     Title:

By   /s/ Yu Haijuan
     ---------------------------------------
     Name: Ms. Yu Haijuan
     Title:

By   /s/ Wang Yuting
      --------------------------------------
     Name: Mr. Wang Yuting
     Title:

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By   /s/ Cao Min
     ---------------------------------------
     Name: Mr. Cao Min
     Title:

By   /s/ Tong Xingxue
     ---------------------------------------
     Name: Mr. Tong Xingxue
     Title:

Solely for purposes of Section 5:

GOOD ENERGIES INVESTMENTS (JERSEY) LIMITED

By    /s/ John Hammill
      ---------------------------------------
      Name: John Hammill
      Title: Director

By    /s/ Fintan Kennedy
      ---------------------------------------
      Name: Fintan Kennedy
      Title: Director

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