CStone Pharmaceuticals — Proxy Solicitation & Information Statement 2022

May 31, 2022

兗礦能源集團股份有限公司 YANKUANG ENERGY GROUP COMPANY LIMITED*

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

(Stock Code: 01171)

Form of Proxy for Use at the 2022 Second Class Meeting of the Holders of H Shares to be Held on Thursday, 30 June 2022

The Number of Shares Represented by the Proxy (note 1) Form

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I/We [(note][2)] , Address [[(note]][[2)]] being the registered holder(s) of (note 1) H shares of RMB 1.00 each in the capital of Yankuang Energy Group Company Limited (the “ Company ”), HEREBY APPOINT [(note][3)] the Chairman of the 2022 second class meeting of the holders of H Shares of the Company (the “ H Shareholders’ Class Meeting* ”) or

Address [[(note]][[2)]]

of as my/our proxy/proxies to attend on my/our behalf at the H Shareholders’ Class Meeting (and/or at any adjournment thereof) to be held at the headquarters of the Company at 949 South Fushan Road, Zoucheng, Shandong Province 273500, the People’s Republic of China at 11:00 a.m. on Thursday, 30 June 2022. The proxy/proxies will vote on the resolutions listed in the Notice of H Shareholders’ Class Meeting as hereunder indicated or, unless otherwise indicated or if no such indication is given, as my proxy/proxies think(s) fit:

	RESOLUTION FOR(note 4) AGAINST(note 4) ABSTAIN(note 4) 1. Special Resolution: “THAT, to consider and approve the Proposal regarding the general mandate authorizing the Board to repurchase H shares”.

• For identification purpose only

• ** The details of the above resolutions are included in the announcement dated 30 March 2022 in relation to the resolution passed at the meeting of the Board (the “ Announcement ”). A circular (the “ Circular ”) containing details of the above resolutions is expected to be despatched to the shareholders of the Company in due course.

Signature [(note][5)] : Date: Notes:

• Unless otherwise specified, capitalised terms used for the resolution have the same meanings as defined in the Announcement and the Circular.

• Please insert the number of shares in the Company to which this form of proxy relates. If no number is inserted, this form of proxy will be deemed to relate to all the shares in the Company registered in your name.

• Full name(s) and address(es) to be inserted in BLOCK LETTERS as shown in the register of members of the Company.

• If the person other than the Chairman of the H Shareholders’ Class Meeting is to be appointed as proxy, please delete “the Chairman of the 2022 second class meeting of the holders of H Shares of the Company or” and insert into the blank space the name and address of the proxy appointed. Each Shareholder is entitled to appoint one or more proxies to attend and vote at the meeting. The proxy needs not be a Shareholder. A proxy of a Shareholder who has appointed more than one proxy may only vote on a poll. Any alteration made to this form of proxy must be initialled by the person(s) who sign(s) it.

• Important: If you wish to vote for any resolution, tick in the box marked “ FOR ”. If you wish to vote against any resolution, tick in the box marked “ AGAINST ”. If you wish to abstain from voting on any resolution, tick in the box marked “ ABSTAIN ”, and your voting will be counted in the total number of votes cast in that resolution for the purpose of calculating the result of that resolution. Failure to tick the box will entitle your proxy to cast your vote at his discretion. Your proxy will also be entitled to vote at his discretion on any resolution properly put to the H Shareholders’ Class Meeting other than those referred to in the notice convening the H Shareholders’ Class Meeting.

• This form of proxy must be signed by you (or by your attorney duly authorized in writing). If you are a legal entity such as a company or an organisation, this form of proxy must be under the seal of the legal entity or be signed by its director (or responsible person) or a duly authorized attorney.

• To be valid, this form of proxy, together with the power of attorney or other documents of authorization under which it is signed, must be delivered to Hong Kong Registrars Limited at 17M Floor, Hopewell Centre, 183 Queen’s Road East, Wanchai, Hong Kong not less than 24 hours before the time appointed for the holding of the H Shareholders’ Class Meeting or any adjournment thereof.

• A proxy attending the H Shareholders’ Class Meeting must present his proof of identity.