Crab breeders collect crabs on the Hongze Lake at Huaihe Township of Xuyi County, east China's Jiangsu Province, Nov. 13, 2018. (Photos: Xinhua)

A crab breeder collects crabs on the Hongze Lake at Huaihe Township of Xuyi County, east China's Jiangsu Province, Nov. 13, 2018.

Crab breeder Han Dan shows crabs on the Hongze Lake at Huaihe Township of Xuyi County, east China's Jiangsu Province, Nov. 13, 2018.

Crab breeders collect crabs on the Hongze Lake at Huaihe Township of Xuyi County, east China's Jiangsu Province, Nov. 13, 2018.