A fisherman (C) demonstrates Chinese mitten crabs on the Yangcheng Lake in Suzhou, east China's Jiangsu Province, Sept. 23, 2016. The 2016 harvest season for Chinese mitten crabs (Eriocheir sinensis) in the Yangcheng Lake, a major producing area, began on Friday. Also known as the big sluice crab, the Chinese mitten crabs are favoured by many gourmet-lovers. (Xinhua/Ji Chunpeng)