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Hesai Group

禾賽科技^*

(A company controlled through weighted voting rights and incorporated in the Cayman Islands with limited liability)

(HKEX Stock Code: 2525)

(NASDAQ Stock Ticker: HSAI)

NOTICE OF CLASS A MEETING

to be held on March 3, 2026

(or any adjourned or postponed meeting thereof)

We refer to the circular (the “Circular”) of Hesai Group (the “Company”) dated January 26, 2026. Unless otherwise indicated, the capitalized terms used in this notice shall have the same meaning as those defined in the Circular.

NOTICE IS HEREBY GIVEN that a class meeting of holders of Class A Ordinary Shares (the “Class A Meeting”) of the Company will be held at No. 28, Ciyun Road, Yancheng Lake Peninsula, Weiting Town, Suzhou Industrial Park, Jiangsu Province, People’s Republic of China on March 3, 2026 at 1:30 p.m., for the purposes of considering and, if thought fit, passing the following resolution:

The passing of the above resolution requires approval by a simple majority of the votes cast by the members of Class A Ordinary Shares who are present and voting in person or by proxy at the Class A Meeting. The quorum of the Class A Meeting shall be one or more members or representing by proxy holding at least one-third in nominal or par value amount of the issued Class A Ordinary Shares of the Company.

SHARES RECORD DATE

The board of directors of the Company has fixed the close of business on February 2, 2026, Hong Kong time, as the record date (the “Shares Record Date”) of Class A ordinary shares with a par value of US$0.0001 each (the “Class A Ordinary Shares”). Holders of record of the Class A Ordinary Shares (as of the Shares Record Date) are entitled to attend and vote at the Class A Ordinary Shares and any adjourned meeting thereof. In order to be eligible to vote and attend the EGM, persons who hold the Class A Ordinary Shares directly on our Cayman Islands register of members should ensure that all valid transfer documents, accompanied by the relevant share certificates, are lodged with our principal share registrar in Cayman Islands, Maples Fund Services (Cayman) Limited, at PO Box 1093, Boundary Hall, Cricket Square, Grand Cayman, KY1-1102, Cayman Islands, before 6:00 p.m., Cayman Islands time, on Sunday, February 1, 2026 (due to the time difference between Cayman Islands and Hong Kong).

PROXY FORMS

A holder of Class A Ordinary Shares as of the Shares Record Date may appoint a proxy to exercise his or her rights at the Class A Meeting. Please refer to the proxy form (for holders of Class A Ordinary Shares), which is available on our website at https://investor.hesaitech.com/.

Holders of record of the Class A Ordinary Shares on the Company’s Register of Members as of the Shares Record Date are cordially invited to attend the Class A Meeting in person. Your vote is important. You are urged to complete, sign, date and return the accompanying proxy form to us (for holders of Class A Ordinary Shares) as promptly as possible and before the prescribed deadline if you wish to exercise your voting rights. We must receive the proxy form by no later than 1:30 p.m., Hong Kong time, on March 1, 2026 at 17/F, Far East Finance Centre, 16 Harcourt Road, Hong Kong to ensure your representation at the Class A Meeting.

As of the date of this notice, the Board comprises: (i) Dr. Yifan Li, Dr. Kai Sun, Mr. Shaoqing Xiang and Ms. Cailian Yang as the executive Directors; and (ii) Ms. Yi Zhang, Mr. Jia Ren and Dr. Hui Wang as the independent non-executive Directors.