Huadian New Energy (SHA:600930) posted first-half attributable net profit of 3.84 billion yuan, down 38% from 6.24 billion yuan the previous year.
Earnings per share fell to 0.0846 yuan from 0.1663 yuan, according to a Thursday filing with the Shanghai bourse.
Operating revenue rose 8.4% year over year to 21.7 billion yuan from 20.0 billion yuan.
Shares of the power company declined 2% in recent trade.