A member of the auxiliary patrol brigade pours water on the top of the boat during a break to cool down at the conflux of the Poyang Lake and the Yangtze River in Hukou County of Jiujiang City, east China's Jiangxi Province, Aug. 6, 2018. The auxiliary patrol brigade consists of 11 members, most of whom used to be fishermen. Now the brigade assists the fishery administration and water police to help with the preservation of cowfish, an endangered subspecies of the finless porpoise in the Yangtze River. (Photo: Xinhua)

Boats of the auxiliary brigade patrol at the conflux of the Poyang Lake and the Yangtze River in Hukou County of Jiujiang City, east China's Jiangxi Province, Aug. 6, 2018. The auxiliary patrol brigade consists of 11 members, most of whom used to be fishermen. Now the brigade assists the fishery administration and water police to help with the preservation of cowfish, an endangered subspecies of the finless porpoise in the Yangtze River. (Photo: Xinhua)

A patrol boat goes together with a boat of the fishery administration at the conflux of the Poyang Lake and the Yangtze River in Hukou County of Jiujiang City, east China's Jiangxi Province, Aug. 6, 2018. The auxiliary patrol brigade consists of 11 members, most of whom used to be fishermen. Now the brigade assists the fishery administration and water police to help with the preservation of cowfish, an endangered subspecies of the finless porpoise in the Yangtze River. (Photo:Xinhua)

Members of the auxiliary brigade patrol on the boat in Hukou County of Jiujiang City, east China's Jiangxi Province, Aug. 6, 2018. The auxiliary patrol brigade consists of 11 members, most of whom used to be fishermen. Now the brigade assists the fishery administration and water police to help with the preservation of cowfish, an endangered subspecies of the finless porpoise in the Yangtze River. (Photo: Xinhua)