In pics: bird protectors of Ulan Suhai Lake, north China

Staff members of the Ulan Suhai Lake Nature Reserve patrol in the wetland of Ulan Suhai Lake in Bayan Nur, north China's Inner Mongolia Autonomous Region, May 12, 2018. The Ulan Suhai Lake, one of the eight largest freshwater lakes in China, is a habitat for about six million wild birds each year. (Xinhua/Liu Lei)