1, main content: Song Ma's husband, a lazy gambler, went to Lin Yingzi's house to be a wet nurse after Song Ma gave birth to a pair of children. Her husband gave her daughter away, and her son was said to have fallen into the river and drowned. It was several years before Song Ma realized that Song Ma had been making new clothes for her son, Xiao Shuan, and taking new shoes home. A few years later, Song Ma went home with her husband on a snowy day.

2, snowballing usury, also known as bean flour cake, is one of the famous traditional snacks in old Beijing. The finished products are red, white and Huang San. Because the final production process needs to be wrapped in yellow bean, just like the bursts of loess raised by wild donkeys in the countryside when they roll around, so it is named snowballing.

3. It is also one of the chapters of "Old Things in the South of the City"-"Rolling on a Donkey". This book was written by Lin Haiyin, a famous Taiwan Province woman writer.