Nantong flatfish is called Longli Fish. Because of its flat body, it is commonly known as flatfish. It is a kind of large-scale bottom fish with warm temperature and rich nutrition. It lives in the offshore waters of China all year round, and has the characteristics of wide temperature and salt, and adapts to changing environmental conditions. Its taste is delicious, its meat yield is high, its taste is smooth, its fish is not old after long cooking, and it has no fishy smell and peculiar smell. It belongs to high protein and rich nutrition, and it has always been the first-class product for consumers in China coastal areas.