Beijing, March 10 (Youth.cn) - On March 8, 2025, at the ecological crab farming base in Linhuai Town, Sihong County, Suqian City, Jiangsu Province, crab farmers seized the sunny weather to plant Nuttall’s waterseed. This initiative aims to increase dissolved oxygen levels and purify water quality in crab ponds, ensuring healthy growth of river crabs. Photo/CFP