Two-part allegorical saying: Scallion mixed with tofu-one clear (green) and two white. The color of shallots is half white and half green, while tofu is white. Therefore, it is said that one is green and two are white, and the green is homophonic, which forms the idiom one is clear and two are white. This two-part allegorical saying is often used to describe being completely innocent or knowing one's heart very well.

This kind of homophonic two-part allegorical saying is to use homophones or homophones to harmonize, and to derive another meaning from the original meaning. Seeing this kind of two-part allegorical sayings, it often takes several turns to suddenly realize it, which is more interesting.

Extended data:

The original two-part allegorical saying is not the same as today's two-part allegorical saying, which is an omission of the common idioms and sentences at that time. Chen Wangdao called it "Tibetan Ci" in The Origin of Rhetoric. For example, using "leaning" instead of "blessing and misfortune" requires a certain knowledge of classical Chinese, and its application scope is limited.

Later two-part allegorical sayings are "figurative-explanatory" witticisms in structure. The user often only speaks the metaphor part, and the later explanation part lets the other person understand it himself.