Power Generation for the First Half Year of 2011

Hong Kong Exchanges and Clearing Limited and The Stock Exchange of Hong Kong
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 POWER GENERATION 
                        FOR THE FIRST HALF YEAR OF 2011
                  
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 contents 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.

Datang International Power Generation Co., Ltd. (the "Company") announces that,
based on the Company's preliminary statistics, as of 30 June 2011, total power
generation of the Company and its subsidiaries (the "Group") amounted to
96.1569 billion kWh, representing an increase of approximately 19.05% when
compared to the corresponding period of the previous year. Total on-grid power
generation of the Group amounted to 90.6614 billion kWh, representing an
increase of approximately 19.27% when compared to the corresponding period of
the previous year.

The significant increase in power generation of the Group for the first half
year of 2011 over the corresponding period of the previous year was mainly
attributable to an increase in capacity of the operational generating units of
the Group and an increase in the demand for electricity in the service areas of
the Group.

Details of the power generation of the Group for the first half year of 2011
were as follows (Unit: billion kWh):

Power plant/company                         Power          Power       Growth
                                       generation     generation             
                                    for the first  for the first          (%)
                                     half year of   half year of 
                                             2011           2010               
                                                                               
                                    (billion kWh)   (billion kWh)                
                                    -------------  -------------  ----------- 
Gao Jing Thermal Power Plant               1.6177         1.6835        -3.91  
                                                                               
Dou He Power Plant                          4.331         4.2014         3.08  
                                                                               
Xia Hua Yuan Power Plant                    0.528         0.5145         2.62  
                                                                               
Zhang Jia Kou Power Plant                  6.9134         6.6552         3.88  
                                                                               
Tianjin Datang International               3.3021         3.4132        -3.26  
  Panshan Power Generation Company                                               
  Limited                                                                        
                                                                               
Inner Mongolia Datang International       10.6179        10.1039         5.09  
  Tuoketuo Power Generation Company                                              
  Limited                                                                        
                                                                               
Shanxi Datang International Yungang        3.2756         3.1472         4.08  
  Thermal Power Company Limited                                                  
                                                                               
Hebei Datang International Tangshan        1.8038          1.658         8.79  
  Thermal Power Company Limited                                                  
                                                                               
Shanxi Datang International Shentou         2.642          2.454         7.66  
  Power Generation Company Limited                                               
                                                                               
Gansu Datang International                 1.6782         1.5835         5.98  
  Liancheng Power Generation Company                                             
  Limited                                                                        
                                                                               
Hebei Datang International Wangtan         2.9609          3.439       -13.90  
  Power Generation Company Limited                                               
                                                                               
Zhejiang Datang International              5.3216         6.5222       -18.41  
  Wushashan Power Generation Company                                             
  Limited                                                                        
                                                                               
Guangdong Datang International              9.133         3.1931       186.02  
  Chaozhou Power Generation Company                                              
  Limited                                                                        
                                                                               
Fujian Datang International Ningde         7.5378         4.0524        86.01  
  Power Generation Company Limited                                               
                                                                               
Yunnan Datang International                4.5029         3.4851        29.20  
  Electric Power Generation Company                                              
  Limited                                                                        
                                                                               
Jiangxi Datang International Xinyu         1.0812         0.8051        34.29  
  Power Generation Company Limited                                               
                                                                               
Shanxi Datang International                2.9747         3.0133        -1.28  
  Yuncheng Power Generation Company                                              
  Limited                                                                        
                                                                               
Inner Mongolia Datang International        0.9463          1.382       -31.53  
  Hohhot Thermal Power Generation                                                
  Company Limited                                                                
                                                                               
Chongqing Datang International             2.2409          2.098         6.81  
  Pengshui Hydropower Development                                                
  Company Limited                                                                
                                                                               
Inner Mongolia Datang International        0.0014         0.0026       -46.15  
  Duolun Hydropower Multiple                                                     
  Development Company Limited                                                    
                                                                               
Qinghai Datang International               0.3421         0.3457        -1.04  
  Zhiganglaka Hydropower Generation                                              
  Development Company Limited                                                    
                                                                               
Hebei Datang International Huaze           0.0084         0.0097       -13.40  
  Hydropower Generation Development                                              
  Company Limited                                                                
                                                                               
Inner Mongolia Datang International        0.2034         0.1014       100.59  
  Wind Power Development Company                                                 
  Limited                                                                        
                                                                               
Inner Mongolia Datang International        3.5623         3.3591         6.05  
  Tuoketuo No.2 Power Generation                                                 
  Company Limited                                                                
                                                                               
Liaoning Datang International               1.465         1.6656       -12.04  
  Jinzhou Thermal Power Generation                                               
  Company Limited                                                                
                                                                               
Shanxi Datang International Zuoyun         0.1578         0.0843        87.19  
  Wind Power Company Limited                                                     
                                                                               
Hebei Datang International Fengrun         1.8344         1.7015         7.81  
  Thermal Power Company Limited                                                  
                                                                               
Ningxia Datang International Daba          3.4995         3.9021       -10.32  
  Power Generation Company Limited                                               
                                                                               
Hebei Datang International                  1.584         1.3965        13.43  
  Zhangjiakou Thermal Power                                                      
  Generation Company Limited                                                     
                                                                               
Qian'an Datang Thermal Power               0.4891         0.5593       -12.55  
  Generation Company Limited                                                     
                                                                               
Liaoning Datang International Wind         0.1941         0.1143        69.82  
  Power Development Company Limited                                              
                                                                               
Fujian Datang International Wind           0.1031          0.088        17.16  
  Power Development Company Limited                                              
                                                                               
Jiangsu Datang International               7.2168         3.6375        98.40  
  Lvsigang Power Generation Company                                              
  Limited                                                                        
                                                                               
Yuneng (Group) Company Limited             0.3175          0.396       -19.82  
                                                                               
Chongqing Datang International             0.0461            Not          Not  
  Wulong Xingshun Wind Power Company                  Applicable   Applicable  
  Limited                                                                        
                                                                               
Shanxi Datang International Linfen         1.4308            Not          Not  
  Thermal Power Company Limited                       Applicable   Applicable  
                                                                               
Ningxia Datang International               0.0077            Not          Not  
  Qingtongxia Photovoltaic Power                      Applicable   Applicable  
  Generation Limited                                                             
                                                                               
Chongqing Datang International              0.105            Not          Not  
  Wulong Hydropower Development                       Applicable   Applicable  
  Company Limited                                                                
                                                                               
Chengdu Liguo Energy Company               0.1794            Not          Not  
  Limited                                             Applicable   Applicable  
                                       ----------     ----------   ---------- 
Total                                     96.1569        80.7682        19.05  
                                       ----------     ----------   ----------

                                                     By Order of the Board
                                                           Zhou Gang
                                                     Secretary to the Board

Beijing, the PRC, 15 July 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*, Jiang Guohua*

* Independent non-executive Directors