Because of the story of Mao Yi. According to the relevant information of hanging meat, hanging meat is also called filial son soup because of the story of Mao Yi. Hanging meat has soup, so it is also called beating broth. Mao Yi, a native of Shucheng in the Eastern Han Dynasty, was born in a poor family since childhood. It can be said that at that time, the whole family had no clothes to cover themselves and no food to eat. However, as a son, Mao Yi tried to leave everything to his parents.