Supplemental Notice of 2015 First EGM

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from or in reliance upon the whole or any part of the contents of 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)

                                SUPPLEMENTAL NOTICE OF
                        2015 FIRST EXTRAORDINARY GENERAL MEETING

Reference is made to the Notice of 2015 First Extraordinary General Meeting (the "EGM") of Datang
International Power Generation Co., Ltd. (the "Company") dated 23 December 2014 (the "EGM Notice").

After the date of the EGM Notice, the board of directors of the Company (the "Board") received from
its controlling shareholder, China Datang Corporation ("CDC"), a proposal letter for adding 
additional resolution for the consideration and approval by the shareholders of the Company 
(the "Shareholders") at the EGM. Details of the proposal are as follows:

Since the "Resolution on the Financial Guarantee for the Year of 2015" and the "Resolution on 
Provisions for Impairment" were considered and approved at the seventeenth meeting of the eighth
session  of the Board, they are proposed to be considered and approved as additional ordinary 
resolutions by the Shareholders at the EGM.

SUPPLEMENTAL NOTICE IS HEREBY GIVEN that the EGM of the Company will be held at the function 
room of 5/F, Intercontinental Hotel, No. 11 Financial Street, Xicheng District, Beijing, the 
People's Republic of China (the "PRC") on 10 February 2015 (Tuesday) at 9:30 a.m. to consider 
and, if thought fit, pass the following ordinary resolutions:

                              ORDINARY RESOLUTIONS

3. To consider and approve the "Resolution on the Financial Guarantee for the Year of 2015" 
   (Note 2)

4. To consider and approve the "Resolution on Provisions for Impairment" (Note 3)

                                                                   By Order of the Board
                                                                        Zhou Gang
                                                                  Secretary to the Board

Beijing, the PRC, 26 January 2015

Notes:

1. Save as the additional resolution and other information as set out in this Supplemental 
   Notice of 2015 First Extraordinary General Meeting, all the information set out in the 
   EGM Notice remains unchanged.

2. The Board agreed and submitted the following for consideration and approval by the 
   Shareholders at the EGM: (1) the Company to provide joint liability guarantee for the 
   financing of its recognised controlled subsidiaries and associates (joint venture companies) 
   within the limit of RMB6 billion within the year of 2015; (2) the Company to adjust the 
   amount of guarantee to be provided to the controlled subsidiaries and associates (joint 
   venture companies) within the limit of RMB6 billion based on the actual circumstances. If 
   the amount of guarantee to be provided to a particular subsidiary is higher than the maximum 
   guarantee amount approved by the Board and at the general meeting of the Company, disclosure 
   shall be made separately in accordance with the relevant requirements; (3) the Company to 
   provide guarantee within the limit of RMB6 billion to other controlled subsidiaries which 
   are not included within the said limit of RMB6 billion (excluding companies with gearing 
   ratio of over 70%). However, the aggregate amount of guarantee to be provided to these 
   companies shall not exceed 5% of the latest audited net assets of the Company and a 
   separate announcement shall be made in relation to the guarantee in accordance with the 
   relevant requirements.

3. The Board agreed and submitted the following for consideration and approval by the 
   Shareholders at the EGM: (1) the Company to provide joint liability guarantee for the 
   financing of its recognised controlled subsidiaries and associates (joint venture companies) 
   within the limit of RMB6 billion within the year of 2015; (2) the Company to adjust the 
   amount of guarantee to be provided to the controlled subsidiaries and associates (joint 
   venture companies) within the limit of RMB6 billion based on the actual circumstances. 
   If the amount of guarantee to be provided to a particular subsidiary is higher than the 
   maximum guarantee amount approved by the Board and at the general meeting of the Company, 
   disclosure shall be made separately in accordance with the relevant requirements; (3) the 
   Company to provide guarantee within the limit of RMB6 billion to other controlled 
   subsidiaries which are not included within the said limit of RMB6 billion (excluding 
   companies with gearing ratio of over 70%). However, the aggregate amount of guarantee to 
   be provided to these companies shall not exceed 5% of the latest audited net assets of the 
   Company and a separate announcement shall be made in relation to the guarantee in accordance 
   with the relevant requirements.

4. Other Matters

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

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

   (3) To be valid, holders of H shares must deliver the Revised Proxy Form (as define below), 
       and if such revised 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 at 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 EGM.

   (4) A revised proxy form for use at the EGM (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 EGM Notice dated 23 December 2014 (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 2015 First 
       Extraordinary General Meeting. Completion and return of the Revised Proxy Form will 
       not preclude a Shareholder from attending and voting at the EGM in person.

   (5) The EGM is expected to last for an hour. 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:

Chen Jinhang, Hu Shengmu, Wu Jing, Liang Yongpan, Zhou Gang, 
Cao Xin, Cai Shuwen, Liu Haixia, Guan Tiangang, Yang Wenchun, 
Dong Heyi*, Ye Yansheng*, Zhao Jie*, Jiang Guohua*, Feng Genfu*

* Independent non-executive director