CStone Pharmaceuticals — Board/Management Information 2022

Feb 25, 2022

Hong Kong Exchanges and Clearing Limited and The Stock Exchange of Hong Kong Limited take no responsibility for the contents of this announcement, make no representation as to its accuracy or completeness and expressly disclaim any liability whatsoever for any loss howsoever arising from or in reliance upon the whole or any part of the contents of this announcement.

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兗礦能源集團股份有限公司

YANKUANG ENERGY GROUP COMPANY LIMITED*

(A joint stock limited company incorporated in the People’s Republic of China with limited liability) (Stock Code: 1171)

CHANGE OF JOINT COMPANY SECRETARY AND AUTHORIZED REPRESENTATIVE AND WAIVER FROM STRICT COMPLIANCE WITH RULES 3.28 AND 8.17 OF THE LISTING RULES

CHANGE OF JOINT COMPANY SECRETARY AND AUTHORIZED REPRESENTATIVE

The board of directors (the “ Board ”) of Yankuang Energy Group Company Limited* (the “ Company ”) hereby announces that Ms. LEUNG Wing Han Sharon (梁頴嫻) (“ Ms. Leung ”) has tendered her resignation as the joint company secretary of the Company (the “ Joint Company Secretary ”) and an authorized representative to accept on the Company’s behalf service of process and notices in Hong Kong under Rule 19A.13(2) of the Rules Governing the Listing of Securities (the “ Listing Rules ”) on The Stock Exchange of Hong Kong Limited (the “ Stock Exchange ”) and of the Companies Ordinance (Chapter 622 of the Laws of Hong Kong) (the “Authorized Representative”), with effect from 25 February 2022.

Ms. Leung confirmed that she has no disagreement with the Board and there is no matter relating to her resignation that needs to be brought to the attention of the Stock Exchange and the shareholders of the Company.

The Board further announces that Mr. Wong Wai Chiu (黃偉超先生) (“ Mr. Wong Wai Chiu ” ) has been appointed as the Joint Company Secretary and the Authorized Representative with effect from 25 February 2022.

The biographical details of Mr. Wong Wai Chiu are set out as follows:

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Mr. Wong Wai Chiu is the Associate Director of SWCS Corporate Services Group (Hong Kong) Limited. Mr. Wong Wai Chiu has extensive compliance and listed corporate secretarial experience.

Mr. Wong Wai Chiu is a fellow of Hong Kong Chartered Governance Institute (previously known as Hong Kong Institute of Chartered Secretaries), a fellow of the Chartered Governance Institute, a member of CPA Australia, a member of the Hong Kong Trustee Association and a Certified Trust Practitioner.

Mr. Wong Wai Chiu possesses a B. Soc. Sc. (Hon.) in Accounting and Management from the University of Hong Kong, a Post-Graduate Diploma in Hong Kong and UK law from the Manchester Metropolitan University of United Kingdom, Master degree in Corporate Governance from the Hong Kong Polytechnic University, Master Degree in Arbitration and Dispute Resolution from City University of Hong Kong and Master of Applied Science (Information Science) Degree from the University of Technology, Sydney, Australia.

WAIVER FROM STRICT COMPLIANCE WITH RULES 3.28 AND 8.17 OF THE LISTING RULES

Reference is made to the waiver (the “ Waiver ”) granted to the Company by the Stock Exchange from strict compliance with the requirements of Rules 3.28 and 8.17 of the Listing Rules in respect of the eligibility of Mr. Huang Xiaolong (黃霄龍) (“ Mr. Huang Xiaolong ”) to act as a Joint Company Secretary for a three-year period from the date of appointment of Mr. Huang Xiaolong as a Joint Company Secretary of the Company (i.e. 27 August 2021) to 26 August 2024 (the “ Waiver Period ”), on the condition that Mr. Huang Xiaolong would be assisted by Ms. Leung, who possesses the qualifications required under Rule 3.28 of the Listing Rules, during the Waiver Period.

Given the condition of the Waiver could no longer be fulfilled following the resignation of Ms. Leung, the Company has applied to the Stock Exchange and has already been granted with a new waiver (the “New Waiver”) by the Stock Exchange from strict compliance with the requirements under Rules 3.28 and 8.17 of the Listing Rules for the remaining period of the Waiver Period (i.e. from 25 February 2022 to 26 August 2024) (the “ New Waiver Period ”) in relation to the eligibility of Mr. Huang Xiaolong to act as a Joint Company Secretary, on the conditions that: (i) Mr. Huang Xiaolong will be assisted by Mr. Wong Wai Chiu during the New Waiver Period; (ii) the New Waiver could be revoked if there are material breaches of the Listing Rules by the Company; and (iii) the Company will announce the details of the New Waiver, including its reasons and conditions.

The publication of this announcement aims to satisfy condition (iii) set out above.

The Company shall notify the Stock Exchange at the end of the New Waiver Period for the Stock Exchange to re-visit the situation. The Stock Exchange expects that, after the

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end of the New Waiver Period, the Company will be able to demonstrate that Mr. Huang Xiaolong , having had the benefit of Mr. Wong Wai Chiu’s assistance during the New Waiver Period, has attained the relevant experience and is capable of discharging the functions the company secretary under Rule 3.28 of the Listing Rules such that a further waiver will not be necessary. The New Waiver will be revoked immediately if and when Mr. Wong Wai Chiu ceases to provide assistance to Mr. Huang Xiaolong.

The biographical details of Mr. Huang Xiaolong are set out as follows:

Huang Xiaolong, born in November 1977, is a senior economist and master of law. Mr. Huang Xiaolong joined the Company’s predecessor in 1999. He was appointed as the Company’s securities representative in 2006, deputy-division-director-level secretary of the Company’s Secretary Office to the Board in 2008, and deputy director of the Company’s Secretary Office to the Board in 2012. He was appointed as the director of the Equity Reform and Restructuring Office of the former Shandong Energy Group Co., Ltd. ( 山東能源集團有限公司 ) in 2013, and director and deputy general manager of Dongguan Haichang Industry Co., Ltd. ( 東莞市海昌實業有限公司) in 2016. He was appointed as a member of the Secretary Office to the Board of Shandong Energy Group Co., Ltd. in August 2020, and as the Board secretary of the Company in July 2021, and as the company secretary of the Company in August 2021. Mr. Huang Xiaolong graduated from University of International Business and Economics.

The Board would like to take this opportunity to express its gratitude to Ms. Leung for her valuable contribution to the Company during her tenure of service, and to welcome Mr. Wong Wai Chiu on his new appointment.

By order of the Board Yankuang Energy Group Company Limited Li Wei* Chairman of the Board

Zoucheng, Shandong Province, the PRC 25 February 2022

As at the date of this announcement, the Directors of the Company are Mr. Li Wei, Mr. Liu Jian, Mr. Xiao Yaomeng, Mr. Zhu Qingrui, Mr. Zhao Qingchun, Mr. Wang Ruolin and Mr. Huang Xiaolong, and the independent non-executive Directors of the Company are Mr. Tian Hui, Mr. Zhu Limin, Mr. Cai Chang, and Mr. Poon Chiu Kwok.

* For identification purpose only

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