On middle autumn's day, whose popular name is "seven and a half months", local people has the old custom of sacrificing salty cakes to ancestors. It is said that when a family steamed this sacrifice, the child lifted the cover of bamboo steamer and saw a half-ripe salty cake. Thinking it tasteless, he poured a bowl of meat into the cake conveniently. When the parents discovered, the cake had ripened but tasted good. Therefore, people rushed to copy it and salty scallion cake became oily scallion cake through the development.