CStone Pharmaceuticals — Earnings Release 2025

Aug 29, 2025

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.

克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: 01171)

INTERIM RESULTS ANNOUNCEMENT FOR THE SIX MONTHS ENDED 30 JUNE 2025

The board of directors (the "Board") of Yankuang Energy Group Company Limited* (the "Company") is pleased to announce the unaudited interim results of the Company and its subsidiaries for the six months ended 30 June 2025. The interim results have been reviewed by the audit committee of the Board.

This announcement, containing the full text of the 2025 interim report of the Company, complies with the relevant requirements of the Rules Governing the Listing of Securities on The Stock Exchange of Hong Kong Limited in relation to information to accompany preliminary announcements of interim results.

The 2025 interim results of the Company are available for viewing on the websites of The Stock Exchange of Hong Kong Limited at www.hkexnews.hk and of the Company at www.ykenergy.com.

By order of the Board

Yankuang Energy Group Company Limited*

Li Wei

Chairman of the Board

Zoucheng, Shandong Province, the PRC

29 August 2025

As at the date of this announcement, the Directors of the Company are Mr. Li Wei, Mr. Wang Jiuhong, Mr. Liu Jian, Mr. Liu Qiang, Mr. Zhang Haijun, Mr. Su Li and Mr. Huang Xiaolong, and the independent non-executive Directors of the Company are Mr. Zhu Limin, Mr. Gao Jingxiang, Mr. Woo Kar Tung, Raymond and Ms. Zhu Rui.

• For identification purpose only