HNP [HUANENG POWER INTERNATIONAL] 6-K: This Form 6-K consists of: Announcement on Convening
[This Form 6-K consists of: Announcement on Convening 2019 Annual Results Conference Call for Global Investors I. Theme of the Conference Call Conference Call Huaneng Power International, Inc. 124In order to facilitate the investors to understand its operating results and financial position in 2019 m]