HNP [HUANENG POWER INTERNATIONAL] 6-K: This Form 6-K consists of: Monthly Return of
[This Form 6-K consists of: Monthly Return of Equity Issuer on Movements in Securities For the month ended (dd/mm/yyyy) : 31/08/2018 To : Hong Kong Exchanges and Clearing Limited Name of Issuer Huaneng Power International, Inc Date Submitted 03/09/2018 I. Movements in Authorised Share Capital 1. Ordi]