Shad, a treasure in southern aquatic products, enters the river to lay eggs in late spring and early summer every year, and the peak season is from xiaoman to mang. According to "Compendium of Materia Medica", shad "was found in early summer, but not in the remaining months, hence the name".
The shad body is flat, wide and long, white as silver, with much fat under the scales, and generally weighs about 65438±0kg. Fish scales are edible and fresh. Imperial cuisine, which was listed as an emperor in ancient times, is now famous overseas and exported to Hong Kong, Singapore, Japan, the United States and other places.