The beauty of tofu comes from the sister-in-law of Yang Er, Lu Xun's hometown. Calling Yang Er's sister-in-law a "tofu beauty" seems to praise her young beauty and point out her identity as a "tofu shop", but it has another meaning. Southerners usually call teasing and insulting people "eating tofu". In the novel, the author wrote: "When I was a child, I was diagonally opposite the door. The business of this tofu shop is very good. But it's probably because of age, but it's not affected by anything ... "From here, we can see that the" Tofu Beauty "used her young beauty to attract customers, which will inevitably lead to the frivolous and playful humiliation of some idle people. Because of this relationship, the business in the store is very good. Therefore, Sister Yang Er is called "Tofu Beauty", and she is often called "Tofu Beauty".