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(Stock Code: 902) 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 2012 annual general meeting of Huaneng Power International, Inc. (the "Company") held on 19 June 2013, 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 herein) in the PRC within 24 months from the date on which the shareholders' approval was obtained.
The Company has recently completed the issue of the first tranche of the Company's super short-term debentures for 2015 (the "Debentures") . The total issuing amount was RMB2 billion with a maturity period of 270 days whereas the unit face value is RMB100 and the interest rate is 3.11%.
Industrial and Commercial Bank of China Limited 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 operational working capital of the Company.

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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.
By Order of the Board Huaneng Power International, Inc. Du Daming

Company Secretary

As at the date of this announcement, the directors of the Company are:
Cao Peixi (Executive Director)
Guo Junming (Non-executive Director)
Liu Guoyue (Executive Director) Li Shiqi (Non-executive Director) Huang Jian (Non-executive Director) Fan Xiaxia (Executive Director)
Mi Dabin (Non-executive Director) Guo Hongbo (Non-executive Director) Xu Zujian (Non-executive Director)
Li Song (Non-executive Director)
Li Zhensheng (Independent Non-executive Director) Qi Yudong (Independent Non-executive Director) Zhang Shouwen (Independent Non-executive Director) Yue Heng (Independent Non-executive Director)
Zhang Lizi (Independent Non-executive Director)
Beijing, the PRC
16 June 2015

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