Two-part allegorical saying is a special language form of Chinese. It is a special language form created by the people in their life practice, and it is a short, funny and vivid sentence.
Two-part allegorical saying is composed of two parts. The former part plays the role of "introduction", like a riddle, and the latter part plays the role of "backing", like a riddle, which is very natural and appropriate.
In a certain language environment, you can understand and guess the original intention by saying the first half sentence and "resting" the second half sentence, so it is called two-part allegorical saying.
Chinese civilization has a long history, and the precipitation and refinement of historical vicissitudes have condensed into a wonderful Chinese language art, among which two-part allegorical sayings, with their unique expressive force, give people profound thinking and enlightenment and spread through the ages.