[This Form 6-K consists of: 3. An announcement regarding 2015 Announcement 1 (a Sino-foreign joint stock limited company incorporated in the People's Republic of China) (Stock Code: 902) POWER GENERATION WITHIN CHINA INCREASES BY 8.05% FOR THE THREE QUARTERS OF 2015 Company Huaneng Power International, Inc. (the “ According to the Company’s preliminary statistics, for the third quarter of 2015,]

[This Form 6-K consists of: 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 directors of the Company are: Cao Peixi Li Zhensheng]

[This Form 6-K consists of: CONTENTS PREPARED IN ACCORDANCE WITH INTERNATIONAL FINANCIAL REPORTING STANDARDS 2 Interim Results 2 Business Review for the First Half of the Year 4 Prospects for the Second Half of 2015 5 Management’s Discussion and Analysis (Prepared Under IFRS) 17 Share Capital Structure 17 Purchase, Sale or Redemption of Shares 17 Major Shareholding Structure 18 Directors’]

[This Form 6-K consists of: Announcement (a Sino-foreign joint stock limited company incorporated in the People's Republic of China) (Stock Code: 902) UNIT NO. 2 OF ANYUAN AND GUIDONG HANKOU WIND FARM COMMENCE OPERATION Huaneng Power International Inc. (the “Company”) announces that the 660 MW coal-fired generation unit No. 2 of the “Closing down smaller generation units and replaced with]

[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]