Rangers leave their boat after patrolling in the Poyang lake in east China's Jiangxi Province, May 5, 2018. An auxiliary patrol brigade, among which many are former fishermen, began its mission in June 2017 to protect finless porpoises around the Poyang lake zone in the Province. Finless porpoises are a freshwater animal. Around 1,000 finless porpoises are believed to live in the Yangtze River and a few lakes linked to the busy waterway. (Xinhua/Peng Zhaozhi)