HNP [HUANENG POWER INTERNATIONAL] 6-K: (Original Filing)
[This Form 6-K consists of: RESIGNATION OF DIRECTOR Due to change of work requirement, Ms. Huang Mingyuan, a Non-executive Director of Huaneng Power International, Inc. (the "Company") has, in accordance with the relevant provision of the articles of association of the Company, tendered her resignation report in writing to the board of directors of the Company on 18 May 2012]