Delay in Despatch of Circular

Hong Kong Exchanges and Clearing Limited and The Stock Exchange of Hong Kong Limited take no responsibility for thecontents of this notice, make no representation as to its accuracy or completeness and expressly disclaim anyliability whatsoever for any loss howsoever arising from or in reliance upon the whole or any part of the contentsof this notice. DATANG INTERNATIONAL POWER GENERATION CO., LTD. (a sino-foreign joint stock limited company incorporated in the People's Republic of China) (Stock Code: 00991) DELAY IN DESPATCH OF CIRCULAR REGARDING MAJOR TRANSACTION AND CONTINUING CONNECTED TRANSACTIONS Reference is made to the announcement of the Company dated 25 April 2013 (the "Announcement") in relation to theLeasing Business Cooperation Agreement. Unless otherwise defined, capitalised terms used in this announcementshall have the same meanings as those defined in the Announcement. As stated in the Announcement, a circular (the "Circular") containing, among others, details of the LeasingBusiness Cooperation Agreement, a letter from the independent board committee and a letter from the independentfinancial advisor, both advising the terms of the Leasing Business Cooperation Agreement, is expected to bedespatched to the Shareholders on or before 20 May 2013.

As the Company requires additional time to finalise certain information for inclusion in the Circular, thedespatch date of the Circular will be postponed to a date falling on or before 5 June 2013.

By Order of the Board Zhou Gang Secretary to the Board

Beijing, the PRC, 20 May 2013

As at the date of this announcement, the Directors of the Company are:

Liu Shunda, Hu Shengmu, Cao Jingshan, Fang Qinghai, Zhou Gang, Liu Haixia,Guan Tiangang, Mi Dabin, Ye Yonghui, Li Gengsheng, Li Yanmeng*, Zhao Zunlian*,Li Hengyuan*, Zhao Jie*, Jiang Guohua*

* Independent non-executive Directors