The clam is the common name of the clam. Qing Li Tiaoyuan's Notes on South Vietnam: "Cantonese people say:' The south wind starts, the clams fall, born in fog, and made in water. The north wind is thin, the south wind is fat, and it is thick and not thin.

The scientific name of Huangpi is green willow clam, which is produced in the shallow sea of the Yellow Sea. Its shell is yellow, and its meat is yellow, with axe-shaped shells and dark yellow markings. The clam meat contains protein, multivitamins and nutrients needed by human body such as calcium, phosphorus, iron and selenium. It also contains trace cobalt, which has a good effect on maintaining human hematopoietic function and restoring liver function, and its nutritional value is quite high. Because the sea area near Dandong Donggang is rich in nutrients, the astragalus seeds here are bigger, fatter, more delicious and more nutritious than other places.