The homonym of onion mixed with tofu is "green" or "clear". (Onions are blue) is a homonym, which means that things or people are clear and nothing is unclear. The combination of words, onion mixed with tofu, is clear and white, the color of onion is generally white and semi-green, and tofu is white. Therefore, the idiom "one clear and two white" is formed by saying that it is green and homophonic. This kind of two-part allegorical saying is mostly a metaphor that is innocent or clear in the mind.

Sauté ed tofu with scallion.

Onion mixed with tofu is clear and white, onion is half white and half green, and tofu is white. Therefore, it has become an idiom to say that one is green and two is white, and the green is homophonic. Homophonic xiehouyu is one of the most commonly used techniques. The biggest feature of two-part allegorical sayings is humor and profound meaning. Two-part allegorical saying is a unique language form in China, which was created by the people in their life practice.