2. Xiehouyu is a special language form of Chinese. It is a special language form created by the masses in their life practice, and it is a short, funny and vivid sentence.

3. Two-part allegorical saying 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. In a certain language environment, it is usually said that the first half, "rest" to the second half, you can understand and guess its original intention, so it is called two-part allegorical saying.