We usually eat mung bean cakes on Dragon Boat Festival. Mung bean cake is one of the traditional cakes and a summer snack. According to legend, in order to seek safety and health, China's ancient ancestors ate zongzi, realgar wine, mung bean cakes and salted duck eggs during the Dragon Boat Festival.

The main raw materials of mung bean cake are cooked mung bean flour, steamed sweet potato flour (or wheat flour and pea flour), vegetable oil (sesame oil), cooked lard, soft sugar, sugar rose, black jujube meat and sweet-scented osmanthus sugar. It has the characteristics of regular shape, light yellow color, fine and dense texture and soft and waxy taste.

According to taste, it can be divided into north and south, and the north is Beijing flavor. It is made without any grease. Although the entrance is soft, there is no greasy feeling. South China includes Su-style and Yang-style, which need oiling when making, and the taste is soft and delicate.