Huaneng Power International, Inc. Class ASSE: 600011

Reply Slip for 2020 Annual General Meeting

· Issued by Huaneng Power International, Inc. Class A

(Stock Code: 902)

Reply Slip for 2020 Annual General Meeting

I/(We)

of

Telephone number:

and Fax number:

,

being the holder(s) of

H Share(s)/Domestic Share(s)* of Huaneng Power International,

Inc. (the "Company") hereby reply that I/(We) wish to attend or appoint a proxy to attend (on my/our behalf) the 2020 annual general meeting (the "AGM") to be held at 9:00 a.m. on 22 June 2021 at Conference Room A102, the headquarters of the Company, Huaneng Building, 6 Fuxingmennei Street, Xicheng District, Beijing, The People's Republic of China.

Signature:

Date:

Note: Eligible shareholders who wish to attend the AGM are advised to complete and return this reply slip to the Company's business address at Capital Market Department, Huaneng Power International, Inc., Huaneng Building, 6 Fuxingmennei Street, Xicheng District, Beijing 100031, the PRC by post or by facsimile (Fax no.: (+86)-10-6322 6888). Failure to sign and return this reply slip, however, will not preclude an eligible shareholder from attending the AGM.

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