[_______________________ FORM 20-F (Mark One) ¨ OR þ OR ¨ OR ¨ Date of event requiring this shell company report For the transaction period form _______to ______________ HUANENG POWER INTERNATIONAL, INC. PEOPLE’S REPUBLIC OF CHINA (Jurisdiction of incorporation or organization) HUANENG BUILDING 6 FUXINGMENNEI STREET, XICHENG DISTRICT, BEIJING, PEOPLE’S REPUBLIC OF CHINA Mr. Du Daming HUANENG BUILDING, 6 FUXINGMENNEI STREET,] [List of Subsidiaries A list of Huaneng Power International Inc.'s subsidiaries is provided in Note 9 to the consolidated financial statements included in this annual report following Item 19.] [CERTIFICATION I, Peixi Cao, certify that: 1. I have reviewed this annual report on Form 20-F of Huaneng Power International, Inc.; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements] [CERTIFICATION I, Lixin Huang, certify that: 1. I have reviewed this annual report on Form 20-F of Huaneng Power International, Inc.; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements] [18 U.S.C. Section 1350, Section 906 of the Sarbanes-Oxley Act of 2002 (2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.]