FORM 6-K

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16 of

The Securities Exchange Act of 1934

For the month of March 2019

(Indicate by check mark whether the registrant files or will file annual reports

under cover of Form 20-F or Form 40-F.)

Form 20-F         X        Form 40-F 

(Indicate by check mark whether the registrant by furnishing the information

contained in this form is also thereby furnishing the information to the

Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.)

Yes No         X       

(If "Yes" is marked, indicate below the file number assigned to registrant in

connection with Rule 12g3-2(b): 82-__________.)

N/A

Huaneng Power International, Inc.

Huaneng Building,

6 Fuxingmennei Street,

Xicheng District,

Beijing, 100031 PRC

This Form 6-K consists of:

An announcement regarding board meeting date of Huaneng Power International, Inc. (the “Registrant”), made by the Registrant on March 5, 2019.

Hong Kong Exchanges and Clearing Limited and The Stock Exchange of Hong Kong Limited take no responsibility for the contents of this announcement, make no representation as to its accuracy or completeness and expressly disclaim any liability whatsoever for any loss howsoever arising from or in reliance upon the whole or any part of the contents of this announcement.

DATE OF MEETING OF THE BOARD OF DIRECTORS

The board of directors (the “Board”) of Huaneng Power International, Inc. (the “Company”) announces that a meeting of the Board of the Company will be convened on Tuesday, 19 March 2019, for the purposes of considering and approving the final results announcement of the Company for the year ended 31 December 2018 for publication and considering the recommendation of final dividend, if any, and transacting any other business.

By Order of the Board

Huaneng Power International, Inc.

Huang Chaoquan

Company Secretary

As at the date of this announcement, the Directors of the Company are:

Shu Yinbiao (Executive Director) Huang Jian (Non-executive Director) Wang Yongxiang (Non-executive Director)     
Mi Dabin (Non-executive Director) Guo Hongbo (Non-executive Director) Cheng Heng (Non-executive Director) Lin Chong (Non-executive Director) Yue Heng (Independent Non-executive Director) Xu Mengzhou (Independent Non-executive Director)    
Liu Jizhen (Independent Non-executive Director) Xu Haifeng (Independent Non-executive Director) Zhang Xianzhi (Independent Non-executive Director)

Beijing, the PRC

5 March 2019

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the under-signed, thereunto duly authorized.

HUANENG POWER INTERNATIONAL, INC.

By   /s/ Huang Chaoquan

Name:Huang Chaoquan

Title: Company Secretary

Date:  March 6, 2019