Xi Shi was a beautiful woman presented by Gou Jian, the king of Yue, to Fu Cha, the king of Wu in the Spring and Autumn Period, and later regarded her as another name for beauty. Also known as Xizi. Call Yang Er Sister-in-law "Tofu".

We can see that the "beauty of tofu" in those days was to attract customers with its young beauty, which inevitably led to some frivolous and playful humiliation by idlers. Because of this relationship, the store "sells very well". Therefore, Sister-in-law Yang Er is called "Beauty of Tofu", which also means that she is often humiliated. This nickname has an insulting connotation.