There is a custom in Hangzhou, "Sixty-six, the mother eats a piece of meat for her daughter". On her parents' sixty-sixth birthday, the married daughter must buy six catties of 621 pieces of meat and steam sixty-six small birthday peaches for her parents' birthday. The daughter has to cook 66 pieces of meat on her parents' sixty-sixth birthday, plus a day and a piece of land, which makes a total of 68 pieces of meat. The elders should eat 66 pieces of meat in one breath, and the two pieces of heaven and earth should not be eaten, but should be thrown to heaven and earth. In short, these are all manifestations of children's expression of filial piety.