1, onion mixed with tofu, the two-part allegorical saying is one green (clear) and two white. Scallion mixed with tofu is a homophonic allegorical saying, that is, green and clear hair are the same sound.

2. Two-part allegorical saying is a special language form created by working people in China since ancient times. It is a short, funny and vivid sentence. It consists of two parts: the former part plays the role of "introduction", like a riddle, and the latter part plays the role of "back lining", like a riddle, which is very natural and appropriate.