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 thirteenth tranche of the Company’s super short- term debentures for 2021 (the “Debentures”). The total issuing amount was RMB1.5 billion with a maturity period of 32 days whereas the unit face value is RMB100 and the interest rate is 2.05%.

Hengfeng Bank Co., Ltd. acts 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.

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

19 October 2021

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.

ANNOUNCEMENT ON DOMESTIC ELECTRICITY SOLD IN THE FIRST THREE QUARTERS OF 2021

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.

According to the preliminary statistics of Huaneng Power International, Inc., (the “Company”), in the third quarter of 2021, the electricity sold by the Company’s operating power plants in China, on consolidated basis, amounted to 115.188 billion kWh, representing an increase of 10.98% compared to the same period last year. For the first three quarters of 2021, the electricity sold by the Company’s operating power plants in China, on consolidated basis, reached a total of 323.115 billion kWh, representing an increase of 17.11% over the same period last year. The average on-grid electricity settlement price for the Company’s operating power plants in China for the first three quarters of 2021 was RMB417.79 per MWh, representing an increase of 1.28% over the same period last year. For the first three quarters of 2021, the Company’s market based electricity sold ratio was 59.99%, representing an increase of 3.05 percentage points over the same period last year.

The increase in the Company’s power generation was mainly attributable to the following factors:

The electricity sold (in billion kWh) of the Company, by regions, are listed below:

For the third quarter of 2021, the power generation of Tuas Power Limited in Singapore, which is wholly-owned by the Company, accounted for a market share of 18.7% in Singapore, representing a decrease of 2.9 percentage points compared to the same period last year. In the first three quarters of 2021, the accumulated power generation accounted for a market share of 19.9%, representing a decrease of 1.6 percentage points compared to the same period last year.

In the third quarter of 2021, the new generation units put into operation were as follows:

Meanwhile, the installed capacity of certain power plants invested by the Company changed in the third quarter of 2021.

Based on the above, as of 30 September 2021, the Company had a controlled installed capacity of 115,014MW and an equity-based installed capacity of 101,388MW.

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

Beijing, the PRC

19 October 2021