UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G


                    Under the Securities Exchange Act of 1934
                              (Amendment No. One)*

                        Solarfun Power Holdings Co., Ltd.
   --------------------------------------------------------------------------
                                (Name of Issuer)

                                 Ordinary Shares
   --------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    83415U108
                           ---------------------------
                                 (CUSIP Number)

                                December 27, 2007
   --------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)

     Check the appropriate box to designate the rule pursuant to which this
Schedule is filed:

|_|  Rule 13d-l(b)

|_|  Rule 13d-l(c)

|X|  Rule 13d-l(d)



CUSIP No.   83415U108
--------------------------------------------------------------------------------
     1. Names of Reporting Persons.
         I.R.S. Identification Nos. of above persons (entities only).
Hanfei Wang
--------------------------------------------------------------------------------
     2. Check the Appropriate Box if a Member of a Group (See Instructions)
        |X|  (a)
                  --------------------------------------------------------------
        |_|  (b)
                  --------------------------------------------------------------
--------------------------------------------------------------------------------
     3. SEC Use Only
--------------------------------------------------------------------------------
     4. Citizenship or Place of Organization People's Republic of China
--------------------------------------------------------------------------------
Number of         5.  Sole Voting Power
Shares Bene-      --------------------------------------------------------------
ficially by       6. Shared Voting Power               6,271,875 ordinary shares
Owned by Each     --------------------------------------------------------------
Reporting         7.  Sole Dispositive Power
Person With:      --------------------------------------------------------------
                  8. Shared Dispositive Power          6,271,875 ordinary shares
--------------------------------------------------------------------------------
     9. Aggregate Amount Beneficially Owned by Each Reporting Person
        6,271,875 ordinary shares
--------------------------------------------------------------------------------
    10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares
        (See Instructions).
--------------------------------------------------------------------------------
    11. Percent of Class Represented by Amount in Row (9)       2.6%
--------------------------------------------------------------------------------
    12. Type of Reporting Person (See Instructions)
--------------------------------------------------------------------------------
IN
--------------------------------------------------------------------------------


CUSIP No.   83415U108
--------------------------------------------------------------------------------
     1. Names of Reporting Persons.
         I.R.S. Identification Nos. of above persons (entities only).
WHF Investment Co., Ltd
--------------------------------------------------------------------------------
     2. Check the Appropriate Box if a Member of a Group (See Instructions)
        |X|  (a)
                  --------------------------------------------------------------
        |_|  (b)
                  --------------------------------------------------------------
--------------------------------------------------------------------------------
     3.  SEC Use Only
--------------------------------------------------------------------------------
     4. Citizenship or Place of Organization       British Virgin Islands
--------------------------------------------------------------------------------
Number of         5.  Sole Voting Power
Shares Bene-      --------------------------------------------------------------
ficially by       6. Shared Voting Power               6,271,875 ordinary shares
Owned by Each     --------------------------------------------------------------
Reporting         7.  Sole Dispositive Power
Person With:      --------------------------------------------------------------
                  8. Shared Dispositive Power          6,271,875 ordinary shares
--------------------------------------------------------------------------------
     9. Aggregate Amount Beneficially Owned by Each Reporting Person
        6,271,875 ordinary shares
--------------------------------------------------------------------------------
    10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares
        (See Instructions).
--------------------------------------------------------------------------------
    11. Percent of Class Represented by Amount in Row (9)       2.6%
--------------------------------------------------------------------------------
    12. Type of Reporting Person (See Instructions)
--------------------------------------------------------------------------------
CO
--------------------------------------------------------------------------------


Item 1.

      (a) Name of Issuer:

                Solarfun Power Holdings Co., Ltd.

      (b) Address of Issuer's Principal Executive Offices:

                666 Linyang Road, Qidong, Jiangsu Province
                226200, People's Republic of China

Item 2.

      (a) Name of person filing:

                Hanfei Wang
                WHF Investment Co., Ltd (the "Record Holder")

      (b) Address of Principal Business Office or, if none, Residence:

                The address of the principal business office of the Record
                Holder and Mr. Wang is
                666 Linyang Road, Qidong, Jiangsu Province
                226200, People's Republic of China

      (c)  Citizenship:

                Mr. Wang is a citizen of People's Republic of China. The place
                of organization of the Record Holder is the British Virgin
                Islands.

      (d) Title of Class of Securities:

                Ordinary Shares.

      (e) CUSIP Number:

                83415U108

Item 3. If this statement is filed pursuant to ss.ss.240.13d-l(b) or
240.13d-2(b) or (c), check whether the person filing is a:

      (a)  |_|  Broker or dealer registered under section 15 of the Act
                (15 U.S.C. 78o).

      (b)  |_|  Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).

      (c)  |_|  Insurance company as defined in section 3(a)(19) of the Act
                (15 U.S.C. 78c).

      (d)  |_|  Investment company registered under section 8 of the Investment
                Company Act of 1940 (15 U.S.C 80a-8).

      (e)  |_|  An investment adviser in accordance with
                ss.240.13d-l(b)(l)(ii)(E);

      (f)  |_|  An employee benefit plan or endowment fund in accordance with
                ss.240.13d-l(b)(l)(ii)(F);

      (g)  |_|  A parent holding company or control person in accordance with
                ss. 240.13d-l(b)(l)(ii)(G);

      (h)  |_|  A savings associations as defined in Section 3(b) of the Federal
                Deposit Insurance Act (12 U.S.C. 1813);

      (i)  |_|  A church plan that is excluded from the definition of an
                investment company under section 3(c)(14) of the Investment
                Company Act of 1940 (15 U.S.C. 80a-3);

      (j)  |_|  Group, in accordance with ss.240.13d-l(b)(l)(ii)(J).


Item 4.    Ownership.

           (a) Amount Beneficially Owned: 6,271,875*

           (b) Percent of Class: 2.6%

           (c) Number of Shares as to which such person has:

               (i)   Sole power to vote or direct the vote;

               (ii)  Shared power to vote or direct the vote;         6,271,875*

               (iii) Sole power to dispose or direct the
                     disposition of;

               (iv)  Shared power to dispose or direct the
                     disposition of:                                  6,271,875*

               *The Record Holder, of which Mr. Wang is the sole director,
               holds 6,271,875 ordinary shares of the Issuer. Mr. Wang may
               be deemed to be the beneficial owner of the ordinary shares
               held by the Record Holder.

Item 5.    Ownership of Five Percent or Less of a Class

           N/A

Item 6.    Ownership of More than Five Percent on Behalf of Another Person.

           N/A

Item 7.    Identification and Classification of the Subsidiary Which Acquired
           the Security Being Reported on By the Parent Holding Company

           N/A

Item 8.    Identification and Classification of Members of the Group

           N/A

Item 9.    Notice of Dissolution of Group

           N/A

Item 10.   Certification


           (a) The following certification shall be included if the statement is
filed pursuant to ss.240.13d-l(b):

                       By signing below I certify that, to the best of my
                       knowledge and belief, the securities referred to above
                       were acquired and are held in the ordinary course of
                       business and were not acquired and are not held for the
                       purpose of or with the effect of changing or influencing
                       the control of the issuer of the securities and were not
                       acquired and are not held in connection with or as a
                       participant in any transaction having that purpose or
                       effect.

           (b) The following certification shall be included if the statement is
filed pursuant to ss.240.13d-l(c):

                       By signing below I certify that, to the best of my
                       knowledge and belief, the securities referred to above
                       were not acquired and are not held for the purpose of or
                       with the effect of changing or influencing the control of
                       the issuer of the securities and were not acquired and
                       are not held in connection with or as a participant in
                       any transaction having that purpose or effect.

                                    SIGNATURE

     After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.

   Date:  December 27, 2007
                                                   Hanfei Wang

                                             By:   /s/ Hanfei Wang
                                                   -----------------------------
                                                   Name:  Hanfei Wang

                                                   WHF Investment Co., Ltd

                                             By:   /s/ Hanfei Wang
                                                   -----------------------------
                                                   Name:    Hanfei Wang
                                                   Title:   Director


Exhibit A

                             Joint Filing Agreement

         In accordance with Rule 13d-1 (k) under the Securities Exchange Act of
1934, the undersigned hereby agree to the joint filing with all other Reporting
Persons (as such term is defined in the Schedule 13G referred to below) on
behalf of each of them of a statement on Schedule 13G (including amendments
thereto) with respect of the Ordinary Shares, par value $0.0001 per share, of
Solarfun Power Holdings Co Ltd, a Cayman Islands Company, and that this
Agreement may be included as an Exhibit to such joint filing. This Agreement may
be executed in any number of counterparts, all of which shall constitute one and
the same instrument.

           (Remainder of this page has been left intentionally blank.)



     IN WITNESS WHEREOF, the undersigned hereby execute this Agreement on the
27th of December 2007



                                                   Hanfei Wang

                                             By:   /s/ Hanfei Wang
                                                   -----------------------------
                                                   Name:  Hanfei Wang



                                                   WHF Investment Co., Ltd

                                             By:   /s/ Hanfei Wang
                                                   -----------------------------
                                                   Name:    Hanfei Wang
                                                   Title:   Director