Exhibit 99.19

 

JOINT FILING AGREEMENT

 

In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, each of the undersigned hereby agrees to the joint filing on behalf of each of them of a statement on Schedule 13D (including amendments thereto) with respect to the ordinary shares, par value US$0.0002 per share of LakeShore Biopharma Co., Ltd, and that this Agreement be included as an Exhibit to such joint filing. Each of the undersigned acknowledges that each shall be responsible for the timely filing of any statement (including amendments) on Schedule 13D, and for the completeness and accuracy of the information concerning such party contained therein, but shall not be responsible for the completeness and accuracy of the information concerning the other persons making such filings, except to the extent that such party knows or has reason to believe that such information is inaccurate.

 

This Agreement may be executed in any number of counterparts, each of which shall be deemed to be an original, but all of which taken together shall constitute one and the same instrument.

 

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of April 29, 2026.

 

Xue Huaqin By: /s/ Huaqin Xue
    Name: Huaqin Xue
   
Crystal Peak Holdings Inc. By:   /s/ Huaqin Xue
    Name: Huaqin Xue
    Title: Director
     
Crystal Peak Investment Inc. By:   /s/ Huaqin Xue
    Name: Huaqin Xue
    Title: Director
   
Dave Liguang Chenn By:  /s/ Dave Liguang Chenn
    Name: Dave Liguang Chenn
   
Oceanpine Investment Fund II LP By: /s/ Dave Liguang Chenn  
    Name: Dave Liguang Chenn  
    Title: Director
     
Oceanpine Capital Inc. By: /s/ Jiayu Yang
    Name: Jiayu Yang
    Title: Director
   
Adjuvant Capital Management, L.L.C. By: /s/ Kabeer Aziz  
    Name: Kabeer Aziz
    Title: Vice President & Secretary
   
Adjuvant Capital GP, L.P. By:   /s/ Kabeer Aziz
by its general partner Adjuvant Capital Management, LLC   Name: Kabeer Aziz
    Title: Vice President & Secretary

 

 

 

Adjuvant Global Health Technology Fund, L.P. By:  /s/ Kabeer Aziz
by its general partner Adjuvant Capital GP, L.P. by its general partner Adjuvant Capital Management, LLC   Name: Kabeer Aziz
    Title: Vice President & Secretary
   
Adjuvant Global Health Technology Fund DE, L.P. By:   /s/ Kabeer Aziz
by its general partner Adjuvant Capital GP, L.P. by its general partner Adjuvant Capital Management, LLC   Name: Kabeer Aziz
    Title: Vice President & Secretary
   
MSA Growth Fund II, L.P. By:  /s/ Yu (Jenny) Zeng
By: MSA China Growth Fund II GP, LLC, its general partner   Name: Yu (Jenny) Zeng
    Title: Managing Partner
   
MSA China Growth Fund II GP, LLC By: /s/ Yu (Jenny) Zeng
    Name: Yu (Jenny) Zeng
    Title: Manager
   
Superstring Capital Master Fund LP By:   /s/ Ting Guo
By: Superstring Capital Fund GP LLC, its general partner   Name: Ting Guo
    Title: General Partner
   
Superstring Capital Management LP By: /s/ Ting Guo
    Name: Ting Guo
    Title: Managing Partner
   
Epiphron Capital (Hong Kong) Limited By: /s/ Sherry Xiaoyu Liu
    Name: Sherry Xiaoyu Liu
    Title: Director