Increase in Holding of A Shares of the Company ...

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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.

                 DATANG INTERNATIONAL POWER GENERATION CO., LTD. 
   (a sino-foreign joint stock limited company incorporated in the People's    
                              Republic of China)                               

                              (Stock Code: 00991)                              

                       OVERSEAS REGULATORY ANNOUNCEMENT                        

                          ANNOUNCEMENT ON INCREASE IN 
                     HOLDING OF A SHARES OF THE COMPANY BY        
                           China Datang Corporation                            

Special Notice:                                                             
                                                                            
The board of directors (the "Board") and all directors (the "Directors") of 
the Company warrant that there are no false representations and misleading  
statements contained in, or material omissions from this announcement, and  
severally and jointly accept the responsibility for the truthfulness,       
accuracy and completeness of the content of this announcement.              
                                                                            
This announcement is made pursuant to Rule 13.09(2) of the Rules Governing  
the Listing of Securities on The Stock Exchange of Hong Kong Limited (the   
"Listing Rules").                                                           

On 6 May 2011, Datang International Power Generation Co., Ltd. (the "Company")
received a notice from China Datang Corporation ("CDC"), the controlling
shareholder of the Company, regarding its increase in the holding of a portion
of domestic listed RMB-denominated ordinary shares ("A shares") of the Company
as at the date of the announcement through the securities trading system of the
Shanghai Stock Exchange. The Company hereby announces the details as follows:

I.  Details of the current increase of holding of shares

    On 6 May 2011, CDC increased its holding of the Company's A shares amounting
    to 2,335,501 shares through the securities trading system of the Shanghai 
    Stock Exchange, representing approximately 0.02% of the total issued share 
    capital of the Company. Prior to the current purchase of shares, CDC held 
    3,959,241,160 A shares of the Company and China Datang Overseas Investment 
    Co., Ltd. ("Overseas Investment Co"), a wholly-owned subsidiary of CDC, held 
    480,680,000 H shares of the Company, the sum of which represented 
    approximately 36.07% of the total issued share capital of the Company. After
    the current purchase of shares, CDC held 3,961,576,661 A shares of the 
    Company and Overseas Investment Co held 480,680,000 H shares of the Company, 
    the sum of which represented approximately 36.09% of the total issued share 
    capital of the Company.

II. Subsequent purchase plan

    CDC or its subsidiaries intend to continue to purchase A shares or H shares 
    of the Company, through the securities trading system of the Shanghai Stock
    Exchange or the Hong Kong market by way of on-market or off-market
    transactions, within 12 months from the date of the current purchase of 
    shares according to their own needs and the market situations. The 
    aggregate amount of shares to be purchased shall not exceed 2% of the total 
    issued share capital of the Company (including the portion of shares under
    the current purchase). CDC undertakes that CDC and its subsidiaries will 
    not reduce their respective shareholdings in the Company during the course 
    of the share purchase plan and the statutory period.

The Company will continue to pay close attention to the increase in the
controlling shareholder's shareholding of the Company and will issue
announcement in due course in accordance with the requirements of the relevant
rules.

                                                          By Order of the Board
                                                                Zhou Gang
                                                         Secretary to the Board

Beijing, the PRC, 6 May 2011

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, Su Tiegang, Ye Yonghui, Li Gengsheng, Li Yanmeng*, Zhao Zunlian*, 
Li Hengyuan*, Zhao Jie* and Jiang Guohua*.

* Independent non-executive Directors