CStone Pharmaceuticals — Capital/Financing Update 2024

Sep 25, 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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INDICATIVE ANNOUNCEMENT IN RELATION TO THE ISSUANCE OF EXCHANGEABLE CORPORATE BONDS BY THE CONTROLLING SHAREHOLDER

On 25 September 2024, Yankuang Energy Group Company Limited* (the “ Company ”) received a notification from Shandong Energy Group Company Limited* (“ Shandong Energy ”), the controlling shareholder of the Company, informing the Company that on 24 September 2024, Yankuang Group (Cayman) Limited, a wholly-owned subsidiary of Shandong Energy, as the issuer, and Shandong Energy as the guarantor, priced and issued the exchangeable corporate bonds (the “ Exchangeable Bonds Issuance ”) on the Stock Exchange of Hong Kong Limited, with 282,697,893 H shares of the Company held by Yankuang Group (Hong Kong) Limited, a wholly-owned subsidiary of Shandong Energy, as the underlying shares.

The specific details of this Exchangeable Bonds Issuance are as follows:

Bond abbreviation	YGCZCH 3 1/2 10/03/29
Bond code	XS2908992733
Size	USD500 million
Term	5 years (redemption at the option of the bondholders at the end of year 3)
Coupon rate	3.50%
Initial conversion price	HK$13.77 per share
Conversion period	At any time during the period from (and including) 13 November 2024up to (and including) the earliest to occur of (i) the close of business (atthe place where the bond is deposited for exchange) on the date whichfalls seven days prior to the maturity date, (ii) if such bond is to beredeemed pursuant to relevant conditions specified in the offeringcircular, prior to the maturity date, then up to (and including) the close of

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business (at the place aforesaid) in Hong Kong on the date which falls seven days prior to the date fixed for redemption thereof or (iii) if notice requiring redemption has been given by the holder of such bond pursuant to relevant conditions specified in the offering circular, then up to the close of business (at the place aforesaid) in Hong Kong on the date prior to the giving of such notice.

As at the date of this announcement, the book-building and pricing of the Exchangeable Bonds Issuance has been completed and settlement has not yet been completed. 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

Zoucheng City, Shandong Province, the PRC 25 September 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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