HNP Huaneng Power International Inc

SIGNATURES

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 undersigned, thereunto duly authorized.

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.

OVERSEAS REGULATORY ANNOUNCEMENT ISSUE OF SUPER SHORT-TERM DEBENTURES

This announcement is made pursuant to Rule 13.10B of the Rules Governing the Listing of Securities on The Stock Exchange of Hong Kong Limited (the “Listing Rules”).

As resolved at the 2020 annual general meeting of Huaneng Power International, Inc. (the “Company”) held on 22 June 2021, the Company has been given a mandate to issue super short-term debentures (in either one or multiple tranches on rolling basis) with a principal amount of up to RMB30 billion (which means that the outstanding principal balance of the super short-term debentures in issue shall not exceed RMB30 billion at any time within the period as prescribed therein) within the period from approval obtained at 2020 annual general meeting to the conclusion of the 2021 annual general meeting.

The Company has recently completed the issue of the first tranche of the Company’s super short-term debentures for 2022 (the “Debentures”). The total issuing amount was RMB2 billion with a maturity period of 46 days whereas the unit face value is RMB100 and the interest rate is 2.08%.

China Merchants Bank Co., Ltd. act as the lead underwriter to form the underwriting syndicate for the Debentures, which were placed through book-building and issued in the domestic bond market among banks. The proceeds from the Debentures will be used to supplement the working capital of the headquarters of the Company, adjust debts structure and repay bank loans and the debt due. Of which, not less than RMB1.2 billion is intended to be used for the Company’s daily operating turnover, including but not limited to the purchase of coal etc., so as to ensure the people’s livelihood this winter and next spring with a safe and stable supply of energy, and to safeguard the people’s livelihood and heating energy consumption in winter.

The relevant documents in respect of the Debentures are posted on China Money and Shanghai Clearing House at websites of www.chinamoney.com.cn and www.shclearing.com, respectively.

The Debentures do not constitute any transaction under Chapter 14 and Chapter 14A of the Listing Rules.

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

Beijing, the PRC

11 January 2022