This is a poem by Zhou Zuoren. The scene described in the poem is the custom in Shaoxing area. According to Mr. Zhong Shuhe's annotation, "plain sand" is a moon cake made of plain oil, which is different from lard cake in HongLing. "Sand" is also bean paste. It is said that HongLing cake is sweet and delicious, but it has been discontinued for many years. At that time, the children's preference for Susha must have been only for the gameplay that disturbed the complicated altar, but now it is somewhat regrettable to read it.