Water shield, also known as water anemone, commonly known as "horseshoe grass", belongs to the Nymphaeaceae family. It is a wild floating leaf plant that has been growing for many years. The leaves are oval and float on the water surface. The young stems and leaves are covered with transparent glue. Taihu Water Shield, also known as Water Lai, Water Sunflower, etc., is a perennial herb that grows in lakes and swamps. The young leaves can be picked for food between Qingming and Frost every year. It is as famous as seabass and is used in spoons. It is crispy and tender. , Weiqin teeth and cheeks.

"Geng Yu Lu" says: "The taste of rhubarb is slightly like fish marrow and crab fat, but it is lighter and clearer. There is no suitable comparison, but the orchid in the flower and the lychee in the fruit are not enough to be used as a pairing." . Taihu Water shield was originally wild, but human cultivation began during the Wanli period of the Ming Dynasty. After the Wanli period of the Ming Dynasty, Taihu Xunlai was listed as a "tribute".