VISEN

VISEN PHARMACEUTICALS

维昇药业

(Incorporated in the Cayman Islands with limited liability)

(Stock Code: 2561)

SUPPLEMENTAL PROXY FORM

Supplemental form of proxy for use by shareholders of VISEN Pharmaceuticals (the “Company”) at the annual general meeting of the Company (the “Meeting”) to be convened at 1701, 1788 Square, No. 1788 West Nanjing Road, Jing’an District, Shanghai, China on Friday, 26 June 2026 at 10:00 a.m. or at any adjournment thereof.

I/We (note 2)

of

being the registered holder(s) of shares in the issued share capital of VISEN Pharmaceuticals hereby appoint the chairman of the Meeting $^{(Note 2)}$ or

of to act as my/our proxy $^{(note 2)}$ at the Meeting of the Company to be held at 1701, 1788 Square, No. 1788 West Nanjing Road, Jing’an District, Shanghai, China on Friday, 26 June 2026 at 10:00 a.m. or at any adjournment thereof and to vote on my/our behalf as directed below. Terms used in this supplemental proxy form shall have the same meanings as defined in the circular of the Company dated 27 April 2026 (the “Original Circular”) and the supplemental circular of the Company dated 17 June 2026 (the “Supplemental Circular”).

Please make a mark in the appropriate boxes to indicate how you wish your vote(s) to be cast on a poll (note 4).

Dated this __ day of __ 2026

Shareholder’s signature _____ (notes e, f, g and h)

Notes:

a Full name(s) and address(es) are to be inserted in BLOCK CAPITALS. The names of all joint registered holders should be stated.
b Please insert the number of shares registered in your name(s) to which this proxy relates. If no number is inserted, this supplemental form of proxy will be deemed to relate to all the shares in the capital of the Company registered in your name(s). If more than one proxy is appointed, the number of shares in respect of which each such proxy so appointed must be specified.
c A proxy need not be a member of the Company. If you wish to appoint some person other than the Chairman of the Meeting as your proxy, please delete the words “the Chairman of the Meeting or” and insert the name and address of the person appointed proxy in the space provided.
d If you wish to vote for any of the resolutions set out above, please tick (”√”) the box(es) marked “For”. If you wish to vote against any resolutions, please tick (”√”) the box(es) marked “Against”. If this form returned is duly signed but without specific direction on any of the proposed resolutions, the proxy will vote or abstain at his discretion in respect of all resolutions; or if in respect of a particular proposed resolution there is no specific direction, the proxy will, in relation to that particular proposed resolution, vote or abstain at his discretion. A proxy will also be entitled to vote at his discretion on any resolution properly put to the meeting other than those set out in the notice convening the meeting.
e In the case of a joint holding, this form of proxy may be signed by any joint holder, but if more than one joint holder is present at the meeting, whether in person or by proxy, that one of the joint holder whose name stands first on the register of members in respect of the relevant joint holding shall alone be entitled to vote in respect thereof. For the avoidance of doubt, holders of treasury shares of the Company, if any, shall abstain from voting at the Meeting.
f The supplemental form of proxy must be signed by a shareholder, or his attorney duly authorised in writing, or if the shareholder is a corporation, either under its Common Seal or under the hand of an officer or attorney so authorised.
g To be valid, this supplemental form of proxy together with any power of attorney or other authority (if any) under which it is signed or a notarially certified copy of such power or authority must be deposited at the offices of the Company’s branch share registrar in Hong Kong, Computershare Hong Kong Investor Services Limited, at 17M Floor, Hopewell Centre, 183 Queen’s Road East, Wanchai, Hong Kong not later than 48 hours before the time of the meeting or any adjourned meeting.
h Any alteration made to this form should be initialled by the person who signs the form.
i Completion and delivery of this supplemental proxy form will not preclude you from attending and voting at the Meeting if you so wish. In such event, the instrument appointing a proxy shall be deemed to be revoked.
j. This Supplemental Proxy Form is to be used for the supplemental resolution set out in the supplemental notice of AGM and will not affect the validity of duly completed Original Proxy Form in respect of the resolutions set out in the AGM Notice included in the AGM Circular. Shareholders who intend to appoint a proxy to attend the AGM and vote on the resolution set out in the supplemental notice of AGM shall complete and return this Supplemental Proxy Form in accordance with the instructions printed thereon. For the avoidance of doubt, if you have completed and returned the Original Proxy Form in accordance with the instructions printed thereon but have not completed and returned this Supplemental Proxy Form, such shareholder’s proxy will be entitled to vote on behalf of the shareholder in his/her discretion on the resolutions set out in this Supplemental Proxy Form. If you have completed and returned this Supplemental Proxy Form in accordance with the instructions printed thereon but have not completed and returned the Original Proxy Form, such shareholder’s proxy will be entitled to vote on behalf of the shareholder in his/her discretion on the resolutions set out in the Original Proxy Form.

PERSONAL INFORMATION COLLECTION STATEMENT

Your supply of your and your proxy’s (or proxies’) name(s) and address(es) is on a voluntary basis for the purpose of processing your request for the appointment of a proxy (or proxies) and your voting instructions for the AGM of the Company (the “Purposes”). We may transfer your and your proxy’s (or proxies’) name(s) and address(es) to our agent, contractor, or third party service provider who provides administrative, computer and other services to us for use in connection with the Purposes and to such parties who are authorised by law to request the information or are otherwise relevant for the Purposes and need to receive the information. Your and your proxy’s (or proxies’) name(s) and address(es) will be retained for such period as may be necessary to fulfil the Purposes. Request for access to and/or correction of the relevant personal data can be made in accordance with the provisions of the Personal Data (Privacy) Ordinance and any such request should be in writing and sent to the Hong Kong Privacy Officer of Computershare Hong Kong Investor Services Limited at the above address.