Net profits fell to 277.2m yuan ($38.7m) in the first half – a 62.3% slump on the same period last year. Huaneng Renewables had warned in mid-July that a drop of more than 50% could be on the cards.

“Wind condition across the whole country was generally unsatisfactory, and electricity output constraints in certain areas were intensive,” Huaneng Renewables told its investors.

The