[This Form 6-K consists of: CONSTRUCTION PROJECT AT PHASE I OF CHANGTU TAIPING WIND FARM RECENTLY COMPLETED TRIAL RUN " Huaneng Power International Inc. (the ’ To date, the Company By Order of the Board Huaneng Power International, Inc. Du Daming Company Secretary]

[FORM 6-K Form 20-F X Form 40-F Yes No X N/A Huaneng Power International, Inc. Huaneng Building, 6 Fuxingmennei Street, Xicheng District, Beijing, 100031 PRC This Form 6-K consists of: ISSUE OF SHORT-TERM NOTES As resolved at the 2011 annual general meeting of Huaneng Power International, Inc. (the “Company”) held on 12 June 2012, the Company has been given a]

[This Form 6-K consists of: 2 ISSUE OF SHORT-TERM NOTES As resolved at the 2011 annual general meeting of Huaneng Power International, Inc. (the "Company") held on 12 June 2012, the Company has been given a mandate to issue within the PRC short-term notes of a principal amount not exceeding RMB15 billion (in either one or multiple tranches) within 12]

[This Form 6-K consists of: 1. ); and 2. Document 1]

[This Form 6-K consists of: An announcement regarding the power generation within China during the first three quarters of 2012 by Document 1 POWER GENERATION WITHIN CHINA DECREASES BY 5.40% FOR THE FIRST THREE QUARTERS OF 2012 Huaneng Power International, Inc. (the “Company”) announced its power generation for the first three quarters of 2012. According to the Company’s preliminary statistics,]