Supplemental AGM Notice

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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)


                          SUPPLEMENTAL NOTICE OF 2011 ANNUAL GENERAL MEETING


Reference is made to the notice of 2011 annual general meeting of Datang International Power 
Generation Co., Ltd. (the "Company") dated 19 April 2012 (the "AGM Notice").

After the date of the AGM Notice, the board of directors of the Company (the "Board") received from 
China Datang Corporation ("CDC"), its controlling shareholder, a proposal letter requesting to add 
an additional resolution for consideration and approval by the shareholders of the Company (the 
"Shareholders") at the 2011 annual general meeting (the "AGM"). Details of the proposal are as 
follows:

The "Resolution on the Provision of Guarantee for the Borrowing of Hebei Datang International 
Tangshan Thermal Power Generation Company Limited" is proposed to be considered and approved as 
ordinary resolution by the Shareholders at the AGM given that such resolution has been considered 
and passed by the twenty-fourth meeting of the seventh session of the Board.

SUPPLEMENTAL NOTICE IS HEREBY GIVEN that the AGM will be held at the meeting room of 5/F, 
Intercontinental Hotel, No. 11 Financial Street, Xicheng District, Beijing, the People's Republic 
of China (the "PRC") on 6 June 2012 (Wednesday) at 9:00 a.m. to consider and, if thought fit, pass 
the following resolution as ordinary resolution:


                                          ORDINARY RESOLUTION:


6.   To consider and approve the additional content to the "Resolution on the Provision of 
     Guarantees for Certain Subsidiaries of the Company", i.e. to provide a guarantee for the 
     borrowing of Hebei Datang International Tangshan Thermal Power Generation Company Limited 
     (Note 2);

                                                                             By Order of the Board
                                                                                    Zhou Gang
                                                                            Secretary to the Board


Beijing, the PRC
16 May 2012
 
Notes:

1.   Save as the additional resolution and other information set out in this Supplemental Notice of 
     2011 Annual General Meeting, all the information set out in the AGM Notice remains unchanged.

2.   The Company proposed to provide a guarantee with joint liability for the borrowing of Hebei 
     Datang International Tangshan Thermal Power Generation Company Limited ("Tangshan Thermal Power 
     Company"), a subsidiary of the Company, in an amount not exceeding RMB80 million. As the 
     asset-liability ratio of Tangshan Thermal Power Company is over 70%, according to the Listing 
     Rules of Shanghai Stock Exchange, such provision of guarantees is required to be submitted to 
     the general meeting for Shareholders' consideration and approval. For details of the provision 
     of guarantee, please refer to the announcement of the Company dated 11 May 2012.

3.   Other Matters

     (1)  Each of the holders of H shares entitled to attend and vote at the AGM, is entitled to 
          appoint one or more proxies to attend and vote on his/her behalf. A proxy need not be a 
          shareholder of the Company.

     (2)  If the holders of H shares have appointed more than one proxy to attend the AGM, the 
          proxies can only exercise their voting rights by way of poll.

     (3)  To be valid, the holders of H shares must deliver the Revised Proxy Form (as defined 
          below), and if such proxy form is signed by a person on behalf of the appointer pursuant 
          to a power of attorney or other authority, a notarised copy of that power of attorney or 
          other authority, to the Company's H share registrar, Computershare Hong Kong Investor 
          Services Limited of 17M Floor, Hopewell Centre, 183 Queen's Road East, Wanchai, Hong Kong, 
          in not less than 24 hours before the time scheduled for holding the AGM.

     (4)  A revised proxy form for use at the AGM (the "Revised Proxy Form") is published on the 
          websites of The Stock Exchange of Hong Kong Limited (www.hkexnews.hk) and the Company 
          (www.dtpower.com). The Revised Proxy Form shall supersede and replace the proxy form 
          enclosed with the circular of the Company dated 19 April 2012 (the "Previous Proxy Form") 
          and that the Previous Proxy Form shall be invalid. Shareholders who have signed and 
          returned the Previous Proxy Form should complete and return the Revised Proxy Form in 
          accordance with the instructions provided in this Supplemental Notice of 2011 Annual 
          General Meeting. Completion and return of the Revised Proxy Form will not preclude a 
          Shareholder from attending and voting at the AGM in person.

     (5)  The AGM is expected to last for two hours. Attending shareholders and their proxies shall 
          be responsible for their own travel and accommodation expenses.

The Company's office address: 

No. 9 Guangningbo Street,
Xicheng District,
Beijing, the PRC Postcode: 100033
Telephone: [phone] or (8610) 8800 8682
Fax: [phone]

As at the date of this supplemental notice, 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 director