CStone Pharmaceuticals — Capital/Financing Update 2024

Oct 3, 2024

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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ANNOUNCEMENT IN RELATION TO THE COMPLETION OF THE ISSUANCE OF EXCHANGEABLE CORPORATE BONDS BY THE CONTROLLING SHAREHOLDER

Reference is made to the announcement of Yankuang Energy Group Company Limited* (the “ Company ”) dated 25 September 2024 (the “ Announcement ”) in relation to the pricing and issuance of exchangeable corporate bonds by Yankuang Group (Cayman) Limited (“ Yankuang Cayman ”), a wholly-owned subsidiary of Shandong Energy Group Company Limited* (“ Shandong Energy ”), the controlling shareholder of the Company, on the Stock Exchange of Hong Kong Limited.

Recently, the Company received a notification from Shandong Energy, informing the Company that the issuance of exchangeable corporate bonds YGCZCH 3 1/2 10/03/29, with Yankuang Cayman as the issuer, and Shandong Energy as the guarantor, has been completed on 3 October 2024 (the “ Exchangeable Bonds Issuance ”).

The Exchangeable Bonds Issuance will not result in any change of actual control of the Company and will not have any impact on the Company’s production, operation and corporate governance. The Company will perform its information disclosure obligations in a timely manner in accordance with the relevant laws and regulations in respect of any subsequent matters relating to the Exchangeable Bonds Issuance. Investors are advised pay attention to the investment risks.

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

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Zoucheng City, Shandong Province, the PRC 3 October 2024

As at the date of this announcement, the Directors of the Company are Mr. Li Wei, 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. Peng Suping, Mr. Zhu Limin, Mr. Woo Kar Tung, Raymond and Ms. Zhu Rui.

* For identification purpose only

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