CStone Pharmaceuticals — Board/Management Information 2006

May 17, 2006

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

兗州煤業股份有限公司 YANZHOU COAL MINING COMPANY LIMITED

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

CHANGE OF PRINCIPAL PLACE OF BUSINESS IN HONG KONG

The board of directors of Yanzhou Coal Mining Company (the “Company”) hereby announces that the principal place of business of the Company in Hong Kong has been changed to “Room 2608-10, 26/ F, The Center, 99 Queen’s Road Central, Hong Kong” with effect from 8 May 2006 and the office telephone and facsimile numbers as follows:

Telephone: (852) 2136 6185 Facsimile: (852) 2136 6068

By order of the Board of Directors of Yanzhou Coal Mining Company Limited Wang Xin Chairman of the Board

Zoucheng, Shandong Province, PRC, 16 May 2006

As at the date of this announcement, the directors of the Company are Mr. Wang Xin, Mr. Geng Jiahuai, Mr. Yang Deyu, Mr. Shi Xuerang, Mr. Chen Changchun, Mr. Wu Yuxiang, Mr. Wang Xinkun, Mr. Chen Guangshui and Mr. Dong Yunqing, and the independent non-executive directors of the Company are Mr. Pu Hongjiu, Mr. Cui Jianmin, Mr. Wang Xiaojun, Mr. Wang Quanxi.

Please also refer to the published version of this announcement in South China Morning Post.

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