If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. Checkbox not checked

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).






SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D


 
Glory Achievement Fund Limited
 
Signature:/s/ Xueting Xu
Name/Title:Xueting Xu, Director
Date:03/04/2026
 
Bull Group Limited
 
Signature:/s/ LIU Tsz Yin
Name/Title:LIU Tsz Yin, Authorized Signatory
Date:03/04/2026
 
Signature:/s/ LUI Chun Lok
Name/Title:LUI Chun Lok, Authorized Signatory
Date:03/04/2026
 
BULL TRUST
 
Signature:/s/ LIU Tsz Yin
Name/Title:LIU Tsz Yin, Authorized Signatory
Date:03/04/2026
 
Signature:/s/ LUI Chun Lok
Name/Title:LUI Chun Lok, Authorized Signatory
Date:03/04/2026

 

Exhibit A

 

JOINT FILING AGREEMENT

 

In accordance with Rule 13d-1(k) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree to the joint filing with all other Reporting Persons (as such term is defined in the Schedule 13D referred to below) on behalf of each of them of a statement on Schedule 13D (including amendments thereto) with respect to the ordinary shares, par value of $0.0001 per share, of Niu Technologies, 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 taken together shall constitute one and the same instrument.

 

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of March 4, 2026.

 

  Glory Achievement Fund Limited
   
  Signature: /s/ Xueting Xu
  Name: Xueting Xu
  Title: Director
     
  Bull Group Limited
   
  Signature: /s/ LIU Tsz Yin and LUI Chun Lok
  Name: LIU Tsz Yin and LUI Chun Lok
  Title: Authorized Signatories
     
  BULL TRUST
   
  Signature: /s/ LIU Tsz Yin and LUI Chun Lok
  Name: LIU Tsz Yin and LUI Chun Lok
  Title: Authorized Signatories