[This Form 6-K consists of: Document 1 ANNOUNCEMENT OF RESULTS FOR 2013 Power generation by domestic power plants: 317.481 billion kWh Consolidated operating revenue: RMB133.833 billion Net profit attributable to equity holders of the Company: RMB10.426 billion Earnings per share: RMB0.74 Proposed dividend: RMB0.38 per ordinary share (inclusive of tax) SUMMARY OF OPERATING RESULTS The Board of Directors (the “Board”)]

[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 Shao Shiwei]

[This Form 6-K consists of: 1. ADJUSTMENT OF TARIFFS OF GAS FIRED POWER PLANTS “ ” This announcement is made by Huaneng Power International, Inc. (the ’ The Company recently received the Notification from Beijing Municipal Development and Reform Commission Regarding Adjustment of the Temporary Settlement On-Grid Tariffs of Beijing Municipal Gas Fired Power Generation Enterprises (Jing Fa Gai [2014]]

[This Form 6-K consists of: ANNOUNCEMENT REGARDING THE ESTIMATED PROFIT INCREASE IN 2013 The Company and all members of the Board of Directors hereby confirm that this announcement does not contain any false representation, misleading statement or material omission and hereby confirm the truthfulness, accuracy and completeness of the contents of this announcement and jointly accept full responsibility. I. ESTIMATED]