Shanghai Junshi Biosciences Co., Ltd. — Proxy Solicitation & Information Statement 2024

May 30, 2024

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SHANGHAI JUNSHI BIOSCIENCES CO., LTD.[*] 上海君實生物醫藥科技股份有限公司

(a joint stock company incorporated in the People’s Republic of China with limited liability)

(Stock code: 1877)

FORM OF PROXY FOR H SHAREHOLDERS FOR THE CLASS MEETING OF H SHAREHOLDERS TO BE HELD ON FRIDAY, 21 JUNE 2024

I/We, [(Note][1)] of [(Note][1)]

beingof Shanghaithe registeredJunshiholder(s)Biosciencesof [(Note][2)] Co., Ltd.* (the “ Company ”), HEREBY APPOINT THE CHAIRMAN OF THE MEETING H [(Note] Shares 3) or of as my/our proxy to attend and vote for me/us on my/our behalf at the 2024 first class meeting of H Shareholders (“ Class Meeting of H Shareholders ”) of the Company to be held immediately after the conclusion of the 2024 first class meeting of A shareholders of the Company (or any adjournment thereof) at 15th Floor, Building 7, No. 6, Lane 100, Pingjiaqiao Road, Pudong New Area, Shanghai, the PRC on Friday, 21 June 2024 for the purpose of considering and, if thought fit, passing the resolutions as set out in the notice convening the Class Meeting of H Shareholders as indicated below or if no such indication is given, as my/our proxy thinks fit and in respect of any other business that may properly come before the Class Meeting of H Shareholders and/or at any adjournment thereof.

Unless otherwise stated, capitalized terms used herein shall have the same meanings as that defined in the circular of the Company dated 30 May 2024.

		SPECIAL RESOLUTIONSFOR_(Notes 4 _	& 5)AGAINST(Notes 4 & 5)ABSTAIN(Notes 4 & 5) deemed to relate to all the H shares of the Company to attend and vote on his/her behalf. A proxy need Chairman is preferred, strike out the words “THEd. A member of the Company who is the holder ofore than one proxy is so appointed, the appointmentE CHAIRMAN OF THE MEETING WILL ACTO SIGNS THIS FORM.ED “FOR”. IF YOU WISH TO VOTE AGAINSTAIN FROM VOTING ON ANY RESOLUTION,our proxy to cast his/her votes at his/her discretion. in the notice convening the meeting.member being a corporation, by its duly authorizedn one vote on a poll need not use all his/her votes(es) above.der its common seal or under the hand of an officer,ed copy thereof, must be deposited at the Company’ses) not later than 24 hours before the time appointed
	1.	The proposal in relation to the grant of the general mandate to repurchase H Shares
	2.	The proposal in relation to the amendments to the Articles of Association and the Relevant Rulesof Procedures
	Date:Notes:1.2.3.4.5.6.7.	Signature_(Note 6)_:Please insert full name(s) and address(es) (as shown in the register of members) in BLOCK CAPITALS.Please insert the number of H shares of the Company registered under your name(s). If no number is inserted, this form of proxy will be registered under your name(s).Any member of the Company entitled to attend and vote at the meeting is entitled to appoint one or more persons as his/her proxy(ies)not be a member of the Company but must attend the meeting in person to represent the member. If a proxy/proxies other than the CHAIRMAN OF THE MEETING” and insert the full name(s) and address(es) of the proxy (or proxies) desired in the space providetwo or more shares may appoint more than one proxy to represent him/her and vote on his/her behalf at the meeting provided that if mshall specify the number and class of shares in respect of which each such proxy is so appointed. IF NO NAME IS INSERTED, THAS YOUR PROXY. ANY ALTERATION MADE TO THIS FORM OF PROXY MUST BE INITIALED BY THE PERSON WHIMPORTANT: IF YOU WISH TO VOTE FOR ANY RESOLUTION, PLEASE TICK (“�”) THE APPROPRIATE BOXES MARKANY RESOLUTION, PLEASE TICK (“�”) THE APPROPRIATE BOXES MARKED “AGAINST”. IF YOU WISH TO ABSTPLEASE TICK (“�”) THE APPROPRIATE BOXES MARKED “ABSTAIN”. Failure to complete any or all the boxes will entitle yYour proxy will also be entitled to vote at his/her discretion on any resolution properly put to the meeting other than that referred to The resolution will be put to vote by way of poll at the meeting. Every member of the Company present in person (in the case of a representative) or by proxy shall have one vote for every fully paid share of which he/her is the holder. A person entitled to more thaor cast all the votes he/she uses in the same way and in such cases, please state the relevant number of shares in the appropriate boxThis form of proxy must be signed by you or your attorney duly authorized in writing or, in the case of a corporation, must be either unattorney or other person authorized to sign the same.To be valid, this form of proxy together with the power of attorney (if any) or other authority (if any) under which it is signed or a certifiH Share registrar, Tricor Investor Services Limited at 17/F, Far East Finance Centre, 16 Harcourt Road, Hong Kong (for holders of H Sharfor this Class Meeting of H Shareholders or any adjournment thereof.

1. Where there are joint registered holders of any share, any one of such persons may vote at the meeting, either in person or by proxy, in respect of such share and be deemed solely entitled thereto; but if more than one of such joint holders be present at the meeting, the vote of the senior holder who tenders a vote, whether in person or by proxy, shall be accepted to the exclusion of the votes of the other joint holders and, for this purpose, seniority shall be determined by the order in which the names stand in the register of members of the Company in respect of the joint holding.

2. Completion and return of the form of proxy will not preclude you from attending and voting at the meeting in person or any adjournment thereof and, in such event, the form of proxy shall be deemed invalid.

3. Shareholders or their proxy(ies) attending this Class Meeting of H Shareholders should produce their identification documents. 11. Reference to times and dates in this form of proxy are to Hong Kong local times and dates. 12. Further details of the resolutions are set put in the notice to Class Meeting of H Shareholders. Further details of the resolutions will be included in the circular to be despatched to shareholders by the Company.

PERSONAL INFORMATION COLLECTION STATEMENT

“Personal Data” in this statement has the same meaning as “personal data” defined in the Personal Data (Privacy) Ordinance (Chapter 486 of the laws of Hong Kong) (the “ PDPO ”), which may include but not limited to your name, contact telephone number, email address and mailing address. Your supply of Personal Data is on a voluntary basis for the purpose of receiving Corporate Communications in the manner chosen. Your Personal Data will be retained for such period as may be necessary for our verification and record purposes.

You have the right to request access to and/or correction of the respective Personal Data in accordance with the provisions of the PDPO. Any such request for access to and/or correction of the Personal Data should be in writing by either of the following means:

By mail to: Privacy Compliance Officer

Tricor Investor Services Limited

• 17/F, Far East Finance Centre, 16 Harcourt Road, Hong Kong

By email to: is-enquiries@hk.tricorglobal.com

• For identification purpose only.