However, in the Yuan Dynasty, the search was strict, so Liu Bowen gave a plan to put the uprising notes in the cake. Later, when the uprising was successful, Zhu Yuanzhang became emperor and celebrated mooncakes as a national victory festival.
In the Northern Song Dynasty, it was popular in the court, but it also spread among the people. At that time, it was commonly known as "small cake" and "moon group". Later, it evolved into a circle, symbolizing a happy reunion, reflecting people's good wishes for family reunion, and also deeply missing their relatives and friends. The royal family in the Northern Song Dynasty likes to eat a kind of "palace cake" in the Mid-Autumn Festival, commonly known as "small cake" and "moon group". Su Dongpo has a poem: "Small cakes are like chewing the moon, crisp and pleasing."