3SBio Inc. — Proxy Solicitation & Information Statement 2026

Apr 1, 2026

3S

三生制药

3SBIO INC.

(Incorporated in the Cayman Islands with limited liability)

(Stock Code: 1530)

PROXY FORM FOR EXTRAORDINARY GENERAL MEETING

TO BE HELD ON THURSDAY, 23 APRIL 2026 AT 10:00 A.M.

I/We, being the registered holder(s) of 3SBio Inc. (the "Company"), hereby appoint the proxy (Note 1) as specified below or failing him/her, THE CHAIRMAN OF THE MEETING (Note 1) to attend and vote for me/us and on my/our behalf at the extraordinary general meeting of the Company to be held at No. 3 A1, Road 10, Shenyang Economy and Technology Development Zone, Shenyang, People's Republic of China on 23 April 2026 at 10:00 a.m. and at any adjournment thereof in respect of the resolutions as indicated below, or if no such indication is given, as my/our proxy thinks fit.

Registered Holder(s) (Complete in ENGLISH BLOCK CAPITALS. The names of all joint holders should be stated.)
Registered Name
Registered Address
Certificate No. (Note 7)		Signature (Note 5)
Date
Proxy (Note 1) (Complete in ENGLISH BLOCK CAPITALS.)
---	---	---	---
Full Name		No. of Shares (Note 2)
Full Address
ORDINARY RESOLUTION		FOR (Note 4)	AGAINST (Note 4)
---	---	---	---
1.	THAT: (a) the conditional special dividend out of the share premium account of the Company to be implemented by way of distribution in specie (the "Distribution") of all the issued shares of Mandi Inc. (the "Mandi Shares") held by the Company immediately before the completion of the Proposed Spin-off, to the Qualifying Shareholders (as defined in the circular to the shareholders of the Company dated 1 April 2026 (the "Circular"), be and is hereby declared and approved; and (b) the directors of the Company be and are hereby authorized to do all such acts and things as they consider necessary, appropriate, desirable or expedient for the purposes of approving, implementing and/or giving effect to the Distribution in such manner and on such terms as they consider appropriate, including but not limited to, the determination of the exact number of Mandi Shares to be distributed pursuant to the Distribution, calculation of the basis for the Distribution, determination of the mechanism and manner of the transfer or distribution of the Mandi Shares, fixing, re-fixing or making any variations to the Record Date (as defined in the Circular) and any other aspects of the Distribution and the execution, amendment, supplement, delivery and implementation of any documents, agreements and deeds as they may deem fit in compliance with the legal and regulatory requirements and in the interests of the Company.

Notes:

1. If any proxy other than the chairman of the meeting is preferred, please insert the full name and address of the proxy desired in the space provided. A holder entitled to attend and vote at the meeting of the Company is entitled to appoint one or more proxies to attend and vote on his/her behalf. ANY ALTERATION MADE TO THIS PROXY FORM MUST BE INITIALED BY THE PERSON WHO SIGNS IT. The proxy needs not be a shareholder of the Company, but must attend the meeting (or any adjournment thereof) to represent you.
2. Please insert the number of shares for this proxy. If no number is inserted, this proxy form will be deemed to relate to all the shares registered in the name of the holder(s).
3. This proxy form must be signed and dated by the shareholder or his/her attorney duly authorised in writing. If the shareholder is a company, it should execute this proxy form under its common seal or by the signature(s) of (a) person(s) authorised to sign on its behalf. In the case of joint shareholders, any one shareholder may sign this proxy form. The vote of the senior joint shareholder who tenders a vote, whether in person or by proxy, will be accepted to the exclusion of the votes of the other joint shareholder(s) and for this purpose seniority will be determined by the order in which the names stand in the register of members in respect of the joint shareholding.
4. IMPORTANT: IF YOU WISH TO VOTE FOR A RESOLUTION, TICK (a) IN THE RELEVANT BOX BELOW THE BOX MARKED "FOR". IF YOU WISH TO VOTE AGAINST A RESOLUTION, TICK (b) IN THE RELEVANT BOX BELOW THE BOX MARKED "AGAINST". Failure to tick either box in respect of a resolution will entitle your proxy to cast your vote in respect of that resolution at his/her discretion or to abstain. Your proxy will also be entitled to vote at his/her discretion or to abstain on any resolution properly put to the meeting other than those referred to in the notice convening the meeting.
5. In order to be valid, a proxy form and the power of attorney or other authority (if any) under which it is signed, or a notarially certified copy of such power of attorney, must be deposited at the Hong Kong share registrar of the Company, Computershare Hong Kong Investor Services Limited at 17M Floor, Hopewell Centre, 183 Queen's Road East, Wanchai, Hong Kong, not less than 48 hours before the time fixed for holding the meeting or any adjournment thereof.
6. Completion and delivery of this proxy form will not preclude you from attending and voting at the meeting if you so wish.
7. Please provide one certificate number, if possible, to facilitate processing.
8. For the avoidance of doubt, we do not accept any special instructions written on this proxy form.