Yangtze River swordfish, Yangtze River dolphin, Yangtze River anchovies, known as the "Three Fresh Fish of the Yangtze River", due to environmental degradation, overfishing and many other reasons, in recent years, the Yangtze River swordfish and Yangtze River dolphin resources are seriously depleted, and the Yangtze River anchovies are more years of Rarely seen. Zheng Jinliang of Jiangyin City, Jiangsu Province, has been engaged in the breeding and culture of the "Three Fresh Fishes of Yangtze River" since 1999, and in 2002, after the success in the reproduction of puffer fish, he put 400,000 puffer fish fry into the Yangtze River for the first time. Subsequently, every year he will breed the swordfish, puffer fish and other precious fish to the Yangtze River release, 18 years a total of 160 million tails, known as "the first person in the Yangtze River".