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                            December 27, 2023

       Songlin Song
       Chief Executive Officer
       Zhengye Biotechnology Holding Limited
       No.1 Lianmeng Road, Jilin Economic & Technical Development Zone
       Jilin City, Jilin Province, China

                                                        Re: Zhengye
Biotechnology Holding Limited
                                                            Amendment No. 3 to
Draft Registration Statement on Form F-1
                                                            Submitted December
14, 2023
                                                            CIK No. 0001975641

       Dear Songlin Song:

            We have reviewed your amended draft registration statement and have
the following
       comments.

              Please respond to this letter by providing the requested
information and either submitting
       an amended draft registration statement or publicly filing your
registration statement on
       EDGAR. If you do not believe a comment applies to your facts and
circumstances or do not
       believe an amendment is appropriate, please tell us why in your
response.

               After reviewing the information you provide in response to this
letter and your amended
       draft registration statement or filed registration statement, we may
have additional comments.

       Amendment No. 3 to Draft Registration Statement on Form F-1

       Cover Page

   1.                                                   You state you "have
filed with the CSRC the filing documents" and that "except for the
                                                        Supplementary Material
Request issued by the CSRC regarding your planned overseas
                                                        listing on September
26, 2023" you and the operating entity have not received any inquiry
                                                        regarding your planned
overseas listing from the CSRC or any other PRC governmental
                                                        authorities. Please
update your disclosure to clarify whether you have provided the
                                                        Supplementary Material
Request or otherwise advise.
 Songlin Song
FirstName LastNameSonglin   Song
Zhengye Biotechnology  Holding Limited
Comapany27,
December  NameZhengye
              2023       Biotechnology Holding Limited
December
Page 2    27, 2023 Page 2
FirstName LastName
Management's Discussion and Analysis of Financial Condition and Results of
Operations
Results of Operations
Operating expenses, page 65, page 65

2.       We acknowledge the information provided in your response to comment 2.
Please expand
         your discussion of operating expenses to describe and quantify the
major costs within each
         expense caption and key factors causing changes in these expenses for
each period
         presented. In particular for research and development expenses,
quantify total spending
         for each research and development project in your collaboration with
the Government of
         Jilin Province PRC, as discussed on pages 98-103.
Industry
Analysis of Domestic Top Players' Pet Vaccine Portfolio, page 80

3.       We note your response to prior comment 3 and reissue in part. Please
revise your
         disclosure to include a clear description of the trial structure for
project Feline
         Rhinotracheitis, Feline Rhino conjunctivitis and Feline Panleukopenia
Triple Inactivated
         Vaccine.
R&D, page 94

4.       We note your response to our prior comment 5. We also note that the
memorandum was
         signed on April 3, 2018. Please clarify if the termination provisions
remained the same
         and if the duration of the agreement was extended. If so, please
include the updated
         duration or otherwise advise.
Notes to Unaudited Condensed Consolidated Financial Statements
2. Summary of Significant accounting Policies
Research and development expenses, page F-36

5.       We acknowledge the information in your response to prior comment 7.
Please expand
         your disclosure to describe and quantify terms governing your funding
commitments to
         these third parties, including the estimated commitment amount and
duration of the
         funding period, as well as terms governing your access to intellectual
property developed
         under these collaborations. Also, explain the basis for your assertion
that "no research
         project agreement should be accounted in accordance with ASC 730-20,"
including how
         these collaborations differ from arrangements described in ASC
730-20-05. Refer us to
         the technical guidance upon which your relied and revise your
disclosure accordingly.
       Please contact Franklin Wyman at 202-551-3660 or Daniel Gordon at
202-551-3486 if
you have questions regarding comments on the financial statements and related
matters. Please
contact Doris Stacey Gama at 202-551-3188 or Jason Drory at 202-551-8342 with
any other
questions.
 Songlin Song
Zhengye Biotechnology Holding Limited
December 27, 2023
Page 3

                                                     Sincerely,
FirstName LastNameSonglin Song
                                                   Division of Corporation
Finance
Comapany NameZhengye Biotechnology Holding Limited
                                                   Office of Life Sciences
December 27, 2023 Page 3
cc:       Ying Li, Esq.
FirstName LastName