[This Form 6-K consists of: Monthly Return of Equity Issuer on Movements in Securities For the month ended (dd/mm/yyyy) : 30/04/2018 To : Hong Kong Exchanges and Clearing Limited Name of Issuer Huaneng Power International, Inc Date Submitted 02/05/2018 I. Movements in Authorised Share Capital 1. Ordi]

[This Form 6-K consists of: An announcement regarding 2018 first quarterly report (a Sino-foreign joint stock limited company incorporated in the People’s Republic of China) (Stock Code: 902) All financial information set out in this quarterly report is unaudited and prepared in accordance with the P]

[This Form 6-K consists of: 1. 2. Report 1 CONTENTS 1 Chairman’s Statement 02 2 About Us 03 2.1 Company Profile 04 2.2 Corporate Governance 04 2.3 Development Strategy 05 2.4 Company Philosophy 07 2.5 ESG Responsibility Management 07 2.6 Table of Key Performance Indicators in 2017 10 2.7 Stakeholder ]

[This Form 6-K consists of: (Stock Code: 902) ANNOUNCEMENT ON POWER GENERATION Company According to the preliminary statistics of Huaneng Power International, Inc., (the “ The increase in the Company's power generation was mainly attributable to: 1. the increase in electricity demand in various indus]

[This Form 6-K consists of: 2 ANNOUNCEMENT ON RECEIPT OF THE RESULTS COMPENSATION AMOUNT Company Announcement Circular References are made to the announcement of Huaneng Power International, Inc. (the “ By Order of the Board Huaneng Power International, Inc. Huang Chaoquan Company Secretary As at the]