Progress in Major Investment

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
                                         AND
                          INSIDE INFORMATION ANNOUNCEMENT
                                         AND
                    ANNOUNCEMENT ON PROGRESS IN MAJOR INVESTMENT

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 by the Company pursuant to the Inside Information Provisions (as 
defined under the Rules Governing the Listing of Securities on The Stock Exchange of Hong Kong 
Limited (the "Listing Rules")), under Part XIVA of the Securities and Futures Ordinance 
(Cap. 571, Laws of Hong Kong) and Rules 13.09(2)(a) and 13.10(B) of the Listing Rules.


Inner Mongolia Datang International Keshiketeng Qi coal-based natural gas and ancillary gas 
transmission pipelines project (the "Keqi Coal-based Gas Project" or the "Project") was 
approved by the National Development and Reform Commission (the "NDRC") on 20 August 2009, 
being the first large-scale coal-based natural gas pilot project approved by the NDRC. Inner 
Mongolia Datang International Keshiketeng Qi Coal-based Gas Company Limited (the "Keqi 
Coal-based Gas Company"), a subsidiary of Datang Energy and Chemical Company Limited (the 
"Energy and Chemical Company"), which is a wholly-owned subsidiary of Datang International 
Power Generation Co., Ltd. (the "Company"), is responsible for the development and construction 
of the Project. The Project will be constructed in three series, with an annual production 
capacity of 4 billion cubic meters of natural gas. Currently, the Series 1 of the Keqi 
Coal-based Gas Project has gone through all technological process, and has all ancillary 
transmission pipelines connected; the Project is undergoing test-running and fine-tuning 
processes and will commence production in the near future.

The coal-based natural gas produced by the Keqi Coal-based Gas Project will be supplied to 
the Beijing market through the "Keshiketeng Qi ?Gubeikou Gas Transmission Pipeline - metering 
station in Bakeshiying"; the related company of natural gas sales branch of PetroChina Company 
Limited (the "PetroChina Natural Gas Sales Company" or the "Buyer") will receive the coal-based 
gas from the metering station in Bakeshiying, Luanping County, Hebei Province through the 
"Exclusive Natural Gas Pipeline of No.4 Shaanxi-Beijing Pipeline", and these will then be 
transmitted to users in Beijing.

On 10 December 2013, Datang Energy and Chemical Marketing Company Limited (the "Energy and 
Chemical Marketing Company" or the "Seller"), a wholly-owned subsidiary of the Company, 
entered into the Coal-based Natural Gas Sale and Purchase Agreement (the "Agreement") with 
PetroChina Natural Gas Sales Company, the major terms of which are as follows:

1.   Term: 

     The Agreement shall become effective when it is duly signed by the authorised 
     representatives of both parties with their respective company seals affixed thereto, 
     and shall remain effective until 31 December 2043. 

2.   Supply Capacity: 

     As the Keqi Coal-based Gas Project is divided into three stages, namely the trial-run 
     period (120 days from the date of commencement of gas supply), the ramp-up period 
     (from the end of the trial-run period of "Project Series 1" to the end of the 
     trial-run period of "Project Series 3") and the stable peak production period (from 
     the end of ramp-up period to the expiry date the Agreement or the date of termination 
     prior to its expiration), the annual contractual amount of the Series 1 and 2 of the 
     ramp-up period are 1.2 billion cubic meters/year and 2.5 billion cubic meters/year 
     respectively, and that of the stable peak production period is 4.0 billion cubic meters/ year.

3.   Pricing principles:

     (1)   The initial transaction price (the "contractual price") is RMB2.75 per cubic meter 
           (including 13% VAT).

     (2)   The contractual price is based on the coal-based natural gas with lower calorific value 
           of not lower than 8,000kCal/m3. If the lower calorific value of the coal-based natural 
           gas delivered by the Seller is lower than 8,000kCal/m3 on any day during the term of the 
           Agreement, the contractual price applied in the actual settlement shall be discounted 
           as follows:

           Discounted contractual price = contractual price x (the average calorific value of 
           coal-based natural gas on that particular day/8,000). 

     (3)   The abovementioned contractual price shall be valid for the period from the date of 
           entering into the Agreement to 31 December 2016. The contractual price applicable for 
           1 January 2017 and onwards can be adjusted according to pricing and market conditions.

     (4)   If the State requires or recommends natural gas to be measured in calorific value, 
           both parties agreed that the contractual price shall be calculated based on the calorific 
           value in accordance with the requirement of the State and the principles stated in the 
           Agreement.

Upon commencement of production, Keqi Coal-based Gas Project will further enhance the Company's 
competitiveness and profitability, at the same time effectively relieving the supply pressure of 
natural gas in Beijing, thereby contributing to the implementation of energy strategies of the 
State, the development of Beijing and the "Blue Sky Campaign".

                                                                      By Order of the Board
                                                                           Zhou Gang
                                                                    Secretary to the Board


Beijing, the PRC, 10 December 2013

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

Chen Jinhang, Hu Shengmu, Cao Jingshan, Fang Qinghai, Zhou Gang, Li Gengsheng, Cao Xin, 
Cai Shuwen, Liu Haixia, Guan Tiangang, Dong Heyi*, Ye Yansheng*, Li Hengyuan*, Zhao Jie*, 
Jiang Guohua*

* Independent non-executive Directors