HNP [HUANENG POWER INTERNATIONAL] 6-K: This Form 6-K consists of: Announcement 1 THIS
[This Form 6-K consists of: Announcement 1 THIS CIRCULAR IS IMPORTANT AND REQUIRES YOUR IMMEDIATE ATTENTION If you are in any doubt If you have sold or transferred This circular is for information purposes only and does not constitute an invitation or offer to acquire, purchase or subscribe for the securities herein. (a Sino-foreign joint stock limited company incorporated in]