HNP [HUANENG POWER INTERNATIONAL] 6-K: (Original Filing)
[This Form 6-K consists of: HUANENG POWER INTERNATIONAL, INC. Files 2011 Annual Report on Form 20-F www.sec.gov The Company has posted the 2011 Annual Report on its website at www.hpi.com.cn. The 2011 Annual Report can also be accessed electronically at The Company is one of China's largest listed power producers with controlled generation capacity of 60,375 MW and equity-based generation]