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


                                  SCHEDULE 13G

                    UNDER THE SECURITIES EXCHANGE ACT OF 1934
                               (AMENDMENT NO. 1)*

       ORIGIN AGRITECH LIMITED (formerly CHARDAN CHINA ACQUISITION CORP.)
       ------------------------------------------------------------------
                                (Name of Issuer)

                    Common Stock, $.0001 Par Value Per Share
                    ----------------------------------------
                         (Title of Class of Securities)

                                    G67828106
                                    ---------
                                 (CUSIP Number)

                                December 31, 2005
                                -----------------
                      (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-1(b)
                  [ X ]      Rule 13d-1(c)
                  [   ]      Rule 13d-1(d)



  *The remainder of this cover page shall be filled out for a reporting person's
  initial filing on this form with respect to the subject class of securities,
  and for any subsequent amendment containing information which would alter the
  disclosures provided in a prior cover page.

  The information required on the remainder of this cover page shall not be
  deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
  Act of 1934 ("Act") or otherwise subject to the liabilities of that section of
  the Act but shall be subject to all other provisions of the Act (however, see
  the Notes).



                                   Page 1 of 8





--------------------------------------------                                            ------------------------------------------
CUSIP No. G67828106                                             13G                     Page  2           of     8     Pages
--------------------------------------------                                            ------------------------------------------
                                                                                     

---------- -----------------------------------------------------------------------------------------------------------------------
        1  NAME OF REPORTING PERSON
           I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

           S.A.C. Capital Advisors, LLC
           -----------------------------------------------------------------------------------------------------------------------
---------- -----------------------------------------------------------------------------------------------------------------------
        2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                                            (a)  /   /

                                                                                                            (b)  / X /

---------- -----------------------------------------------------------------------------------------------------------------------
        3  SEC USE ONLY
---------- -----------------------------------------------------------------------------------------------------------------------
        4  CITIZENSHIP OR PLACE OF ORGANIZATION

           Delaware
--------------------- ----- ------------------------------------------------------------------------------------------------------
                 F          5  SOLE VOTING POWER

                            0
      NUMBER OF
       SHARES
     BENEFICIALLY     ----- ------------------------------------------------------------------------------------------------------
        OWNED                6  SHARED VOTING POWER
         BY
        EACH                    91,020 (see Item 4)
     REPORTING        ----- ------------------------------------------------------------------------------------------------------
       PERSON               7  SOLE DISPOSITIVE POWER

                            0
                      ----- ------------------------------------------------------------------------------------------------------
                         8  SHARED DISPOSITIVE POWER

                            91,020 (see Item 4)
---------- -----------------------------------------------------------------------------------------------------------------------
        9  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           91,020 (see Item 4)
---------- -----------------------------------------------------------------------------------------------------------------------
       10  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

           /   /

---------- -----------------------------------------------------------------------------------------------------------------------
       11  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

           1.9 % (see Item 4)
---------- -----------------------------------------------------------------------------------------------------------------------
       12  TYPE OF REPORTING PERSON*

           00
---------- -----------------------------------------------------------------------------------------------------------------------


                       *SEE INSTRUCTION BEFORE FILLING OUT

                                   Page 2 of 8





--------------------------------------------                                            ------------------------------------------
CUSIP No. G67828106                                             13G                     Page  3           of     8     Pages
                                                                                     

---------- -----------------------------------------------------------------------------------------------------------------------
        1  NAME OF REPORTING PERSON
           I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

           S.A.C. Capital Management, LLC
---------- -----------------------------------------------------------------------------------------------------------------------
        2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                                            (a)  /   /

                                                                                                            (b)  / X /

---------- -----------------------------------------------------------------------------------------------------------------------
        3  SEC USE ONLY
---------- -----------------------------------------------------------------------------------------------------------------------
        4  CITIZENSHIP OR PLACE OF ORGANIZATION

           Delaware
-------------------- ------ ------------------------------------------------------------------------------------------------------
                         5  SOLE VOTING POWER

                            0
                     ------ ------------------------------------------------------------------------------------------------------
      NUMBER OF          6  SHARED VOTING POWER
       SHARES
     BENEFICIALLY           91,020 (see Item 4)
        OWNED        ------ ------------------------------------------------------------------------------------------------------
         BY              7  SOLE DISPOSITIVE POWER
        EACH
     REPORTING              0
       PERSON        ------ ------------------------------------------------------------------------------------------------------
                         8  SHARED DISPOSITIVE POWER

                            91,020 (see Item 4)
---------- -----------------------------------------------------------------------------------------------------------------------
        9  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           91,020 (see Item 4)
---------- -----------------------------------------------------------------------------------------------------------------------
       10  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

           /   /

---------- -----------------------------------------------------------------------------------------------------------------------
       11  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

           1.9 % (see Item 4)
---------- -----------------------------------------------------------------------------------------------------------------------
       12  TYPE OF REPORTING PERSON*

           00
---------- -----------------------------------------------------------------------------------------------------------------------



                                   Page 3 of 8

                       *SEE INSTRUCTION BEFORE FILLING OUT





--------------------------------------------                                            ------------------------------------------
CUSIP No. G67828106                                             13G                     Page  4           of    8      Pages
--------------------------------------------                                            ------------------------------------------
                                                                                     

---------- -----------------------------------------------------------------------------------------------------------------------
        1  NAME OF REPORTING PERSON
           I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

           Steven A. Cohen
---------- -----------------------------------------------------------------------------------------------------------------------
        2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                                            (a)  /   /

                                                                                                            (b)  / X /

---------- -----------------------------------------------------------------------------------------------------------------------
        3  SEC USE ONLY
---------- -----------------------------------------------------------------------------------------------------------------------
        4  CITIZENSHIP OR PLACE OF ORGANIZATION

           United States
-------------------- ------ ------------------------------------------------------------------------------------------------------
                         5  SOLE VOTING POWER

                            0
                     ------ ------------------------------------------------------------------------------------------------------
      NUMBER OF          6  SHARED VOTING POWER
       SHARES
     BENEFICIALLY           91,020 (see Item 4)
        OWNED        ------ ------------------------------------------------------------------------------------------------------
         BY              7  SOLE DISPOSITIVE POWER
        EACH
     REPORTING              0
       PERSON        ------ ------------------------------------------------------------------------------------------------------
                         8  SHARED DISPOSITIVE POWER

                            91,020 (see Item 4)
---------- -----------------------------------------------------------------------------------------------------------------------
        9  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           91,020 (see Item 4)
---------- -----------------------------------------------------------------------------------------------------------------------
       10  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

           /   /

---------- -----------------------------------------------------------------------------------------------------------------------
       11  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

           1.9 % (see Item 4)
---------- -----------------------------------------------------------------------------------------------------------------------
       12  TYPE OF REPORTING PERSON*

           IN
---------- -----------------------------------------------------------------------------------------------------------------------


                       *SEE INSTRUCTION BEFORE FILLING OUT

                                   Page 4 of 8




ITEM 1(a)    NAME OF ISSUER:

             Origin Agritech Limited (formerly Chardan
             China Acquisition Corp.)

ITEM 1(b)    ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:

             625 Broadway, Suite 1111
             San Diego, CA 92101

ITEMS 2(a)   NAME OF PERSON FILING:

             This statement is filed by: (i) S.A.C.
             Capital Advisors, LLC, ("SAC Capital
             Advisors") with respect to shares of common
             stock ("Shares") of the Issuer beneficially
             owned by S.A.C. Capital Associates, LLC
             ("SAC Capital Associates"); (ii) S.A.C.
             Capital Management, LLC, ("SAC Capital
             Management") with respect to Shares
             beneficially owned by SAC Capital
             Associates; and (iii) Steven A. Cohen with
             respect to Shares beneficially owned by SAC
             Capital Advisors, SAC Capital Management and
             SAC Capital Associates.

ITEM 2(b)    ADDRESS OF PRINCIPAL BUSINESS OFFICE:

             The address of the principal business office of (i) SAC Capital
             Advisors and Mr. Cohen is 72 Cummings Point Road, Stamford,
             Connecticut 06902 and (ii) SAC Capital Management is 540 Madison
             Avenue, New York, New York 10022.

ITEM 2(c)    CITIZENSHIP:

             SAC Capital Advisors and SAC Capital Management are Delaware
             limited liability companies. Mr. Cohen is a United States citizen.

ITEM 2(d)    TITLE OF CLASS OF SECURITIES:

             Common Stock, par value $.0001 per share

ITEM 2(e)    CUSIP NUMBER:

             G67828106

ITEM 3       Not Applicable

ITEM 4       OWNERSHIP:

             The percentages used herein are calculated based upon the Shares
             issued and outstanding as of November 5, 2005 as reported on the
             Chardan China Acquisition Corp.'s quarterly report on Form 10-QSB
             filed with the Securities and Exchange Commission by the Issuer for
             the quarterly period ended September 30, 2005.

                                   Page 5 of 8


             As of the close of business on December 30, 2005:

             1. S.A.C. Capital Advisors, LLC
             (a) Amount beneficially owned: 91,020
             (b) Percent of class: 1.9%
             (c)(i) Sole power to vote or direct the vote: -0-
             (ii) Shared power to vote or direct the vote: 91,020
             (iii) Sole power to dispose or direct the disposition: -0-
             (iv) Shared power to dispose or direct the disposition: 91,020

             2. S.A.C. Capital Management, LLC
             (a) Amount beneficially owned: 91,020
             (b) Percent of class: 1.9 %
             (c)(i) Sole power to vote or direct the vote: -0-
             (ii) Shared power to vote or direct the vote: 91,020
             (iii) Sole power to dispose or direct the disposition: -0-
             (iv) Shared power to dispose or direct the disposition: 91,020

             3. Steven A. Cohen
             (a) Amount beneficially owned: 91,020
             (b) Percent of class: 1.9%
             (c)(i) Sole power to vote or direct the vote: -0-
             (ii) Shared power to vote or direct the vote: 91,020
             (iii) Sole power to dispose or direct the disposition: -0-
             (iv) Shared power to dispose or direct the disposition: 91,020

             SAC Capital Advisors, SAC Capital Management and Mr. Cohen own
             directly no Shares or securities convertible into Shares.
             Pursuant to investment agreements, each of SAC Capital
             Advisors and SAC Capital Management share all investment and
             voting power with respect to the securities held by SAC
             Capital Associates. Mr. Cohen controls each of SAC Capital
             Advisors and SAC Capital Management. By reason of the
             provisions of Rule 13d-3 of the Securities Exchange Act of
             1934, as amended, each of SAC Advisors, SAC Capital Management
             and Mr. Cohen may be deemed to own beneficially 91,020 Shares
             (constituting approximately 1.9% of the Shares outstanding).
             Each of SAC Capital Advisors, SAC Capital Management and Mr.
             Cohen disclaim beneficial ownership of any of the securities
             covered by this statement.

                                   Page 6 of 8



ITEM 5       OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS:

             If this statement is being filed to report the fact that as of the
             date hereof the reporting person has ceased to be the beneficial
             owner of more than five percent of the class of securities, check
             the following. / X /

ITEM 6       OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON:

             Not Applicable

ITEM 7       IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH
             ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING
             COMPANY:

             Not Applicable

ITEM 8       IDENTIFICATION AND CLASSIFICATION OF MEMBERS
             OF THE GROUP:

             Not Applicable

ITEM 9       NOTICE OF DISSOLUTION OF GROUP:

             Not Applicable

ITEM 10      CERTIFICATION:

         By signing below the signatory certifies that, to the best of his
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.

                                   Page 7 of 8



                                    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.

Dated:  February 14, 2006


S.A.C. CAPITAL ADVISORS, LLC


By:      /s/ Peter Nussbaum
   ------------------------
Name:  Peter Nussbaum
Title:  Authorized Person


S.A.C. CAPITAL MANAGEMENT, LLC


By:      /s/ Peter Nussbaum
   ------------------------
Name:  Peter Nussbaum
Title:  Authorized Person


STEVEN A. COHEN


By:      /s/ Peter Nussbaum
   ------------------------
Name:  Peter Nussbaum
Title:  Authorized Person