July 15, 2008

Huaneng Power International, Inc. Power Generation Increases By 13.43% in the First Half Year of 2008

BEIJING, July 15/Xinhua-PRNewswire-FirstCall/ -- Huaneng Power International, Inc. (the "Company") (NYSE: HNP; HKEx: 902; SSE: 600011) announced today its power generation for the first half year of 2008.

(Logo: http://www.xprn.com/xprn/sa/200705141256.JPG )

Based on the Company's preliminary statistics, as of 30 June 2008, the Company's total power generation based on a consolidated basis amounted to 91.448 billion kWh, an increase of 13.43% over the same period last year. The power generation of Yingkou Power Plant, Yuhuan Power Plant, Qinbei Power Plant, Weihai Power Plant, Luohuang Power Plant and Nantong Power Plant increased significantly as compared to the same period last year. The increase in power generation of the Company's power plants was mainly attributable to the following reasons:

1. The newly operating generating units and the newly acquired generating units provided strong support to the growth of the Company's power generation.

2. The continued economic growth in the regions where the Company's power plants are located provided an increase in power demand and room for increasing the power generation of the Company's power plants.

3. Renovation arrangements for the Company's generating units have been optimized, thus facilitating a growth in the Company's power generation.

The power generation of each of the Company's power plants in the first half year of 2008 was listed below (in billion kWh):

                       Power generation    Power generation   Power Plant         in the first        in the first                       half year of 2008   half year of 2007    Change    Dalian                     4.688             5.173           -9.38%   Fuzhou                     3.515             3.570           -1.54%   Nantong                    4.364             3.843           13.56%   Shangan                    3.657             3.434            6.49%   Shanghai    Shidongkou Second         3.687             3.582            2.93%   Shantou Coal-fired         3.500             3.178           10.13%   Dandong                    2.359             2.477           -4.76%   Nanjing                    1.877             1.826            2.79%   Dezhou                     6.849             6.122           11.88%   Jining                     1.208             1.366          -11.57%   Weihai                     2.287             1.961           16.62%   Shanghai    Shidongkou First          3.902             3.486           11.93%   Changxing                  0.838             0.789            6.21%   Taicang                    5.127             5.097            0.59%   Huaiyin                    3.852             4.048           -4.84%   Yushe                      2.614             2.893           -9.64%   Qinbei                     4.831             3.540           36.47%   Xindian                    2.422             2.367            2.32%   Yingkou                    5.367             2.429          120.96%   Jinggangshan               1.558             1.631           -4.48%   Yueyang                    3.148             3.114            1.09%   Luohuang                   6.141             5.389           13.95%   Pingliang                  4.128             4.065            1.55%   Shanghai    Combined-cycle            0.049             0.093          -47.31%   Yuhuan                     8.415             5.145           63.56%   Jinling                    1.065                --               --     

In the first half year of 2008, the power generation of Tuas Power Ltd. amounted to 5.042 billion kWh, representing an increase of 0.21% over the same period last year (i.e. 5.031 billion kWh). Among the power generation of Tuas Power, the power generation attributable to the Company (commencing from 25 March 2008, the date on which the accounts were consolidated) was 2.786 billion kWh.

In addition, based on estimate of the Accounts Department of the Company, it is expected that the Company in the first half year of 2008 may record loss on the consolidated profit attributable to shareholders of the Company. The major reason for the estimated loss was due to a substantial increase in prices for coal used in power generation. Detailed financial information will be disclosed in the 2008 interim report of the Company. Potential investors and shareholder of the Company should exercise caution when dealing in the shares of the Company.

Huaneng Power International, Inc. has a total generation capacity of 36,393MW on an equity basis and a controlling installed generation capacity of 39,789MW. The Company wholly owns sixteen operating power plants, an operating power company, and has controlling interests in thirteen operating power companies and minority interests in five operating power companies. Currently, it is one of the largest listed power producers in China.

   For enquiries, please contact:     Ms. Meng Jing or Ms. Zhao Lin    Huaneng Power International, Inc.    Tel:   +86-10-6649-1856 or +86-10-6649-1866    Fax:   +86-10-6649-1860    Email: [email protected]     Ms. Carrie Lam or Mr. Karl Cheung    Rikes Hill & Knowlton Limited    Tel: +852-2520-2201    Fax: +852-2520-2241  

Photo: http://www.xprn.com/xprn/sa/200705141256.JPG

Huaneng Power International, Inc.

CONTACT: Ms. Meng Jing or Ms. Zhao Lin of Huaneng Power International,Inc., +86-10-6649-1856 or +86-10-6649-1866, fax +86-10-6649-1860,[email protected]; or Ms. Carrie Lam or Mr. Karl Cheung of Rikes Hill & KnowltonLimited, +852-2520-2201, fax +852-2520-2241, for Huaneng Power International,Inc.