The executive until this month in charge of the world’s biggest wind fleet – China Longyuan president Li Enyi – has quit his job and been detained by the Chinese authorities, amid a wide-scale crackdown on corruption in the energy sector.

Longyuan is the largest wind developer in the world and a subsidiary of energy conglomerate China Energy Investment Corp (CEIC), formed by the merger last year between China’s biggest coal miner Shenhua and major power utility Guodian.