[This Form 6-K consists of: PROVISION OF EXTERNAL GUARANTEE For background information relating to this announcement, please refer to an announcement published by Huaneng Power International, Inc. (the ÒCompanyÓ) published on 2 December 2010 (the ÒAnnouncementÓ). Unless defined otherwise, the terms used in this announcement shall have the same meaning used in the Announcement. When the Company acquired the 50%]

[This Form 6-K consists of: 1. 2. 3. 4. 2 HUANENG POWER INTERNATIONAL, INC. Gu Biquan Company Secretary 3 Document 1]

[This Form 6-K consists of: Qinbei Power Plant Unit 5 Completed Trial Run Huaneng Power International, Inc. (the "Company") announced that one 1,000MW ultra-super critical coal-fired generating unit (Unit 5) of Henan Huaneng Qinbei Power Plant Phase III Project (of which the Company owns 60% equity interests) has completed trial run recently. To-date, the Company’s total controlled generation capacity has]

[This Form 6-K consists of: RESIGNATION OF COMPANY SECRETARY The Company shall make further announcement regarding information of the new secretary of the board of directors of the Company as soon as possible. Mr. Gu Biquan confirmed that there is no disagreement with the Board and he is not aware of any matter in relation to his resignation that needs]

[This Form 6-K consists of: DATE OF MEETING OF THE BOARD OF DIRECTORS The board of directors (the "Board") of Huaneng Power International, Inc. (the "Company") announced that a meeting of the Board of the Company will be convened on Tuesday, 20 March 2012, for the purposes of considering and approving the final results announcement of the Company for the]