Netjoy Holdings Limited — Proxy Solicitation & Information Statement 2005

Jun 16, 2005

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(a Sino-foreign joint stock limited company incorporated in the People’s Republic of China)

Reply Slip for Extraordinary 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 extraordinary general meeting (the “EGM”) to be held at 9:00 a.m. on Thursday, 28th July, 2005 at Beijing International Convention Centre at No. 8 Beichen East Road, Chaoyang District, Beijing, the People’s Republic of China.

Signature:

Date:

Note: Eligible shareholders who wish to attend the EGM are advised to complete and return this reply slip to the Company at West Wing, Building C, Tianyin Mansion, 2C, Fuxingmennan Street, Xicheng District, Beijing 100031, the PRC by post or by facsimile (Fax no.: (+86)-10-66491888). Failure to sign and return this reply slip, however, will not preclude an eligible shareholder from attending the EGM.

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