[This Form 6-K consists of: (Stock Code: 902) 2015 Interim Results Announcement Consolidated operating revenue: RMB65.305 billion Profit attributable to equity holders of the Company: RMB8.951 billion Earnings per share: RMB0.62 INTERIM RESULTS The Board of Directors of Huaneng Power International, Inc. (the “Company”) announces the unaudited operating results for the six months ended 30 June 2015 and a comparison]

[This Form 6-K consists of: ISSUE OF SHORT-TERM DEBENTURES Listing Rules Company As resolved at the 2014 annual general meeting of Huaneng Power International, Inc. (the “ Debentures The Company has recently completed the issue of the second tranche of the Company’s short-term debentures for 2015 (the “ Bank of China Limited acts as the lead underwriter to form the]

[This Form 6-K consists of: Announcement 1 (a Sino-foreign joint stock limited company incorporated in the People’s Republic of China) (Stock Code: 902) DATE OF MEETING OF THE BOARD OF DIRECTORS Board Company The board of directors (the “ By Order of the Board Huaneng Power International, Inc. Du Daming Company Secretary As at the date of this announcement, the]

[This Form 6-K consists of: POWER GENERATION WITHIN CHINA INCREASES BY 5.32% FOR THE FIRST HALF YEAR OF 2015]

[This Form 6-K consists of: ANNOUNCEMENT ON INCREASE OF SHAREHOLDING IN THE COMPANY BY THE CONTROLLING SHAREHOLDER “ the Company ” “ Huaneng International ” This announcement is made by Huaneng Power International, Inc. ( “]