Zhang Fei eating bean sprouts is a metaphor for easy or trivial things. Zhang Fei is a strong man in the Three Kingdoms. Bean sprouts are a piece of cake for Zhang Fei, so Zhang Fei eats bean sprouts-a piece of cake.

This story tells the story of Liu Bei, Guan Yu and Zhang Fei marching together. One day, when they passed a meadow, they met a vendor selling bean sprouts. Unlike others, Zhang Fei couldn't help but have an appetite after seeing bean sprouts. He went directly to the vendor to buy bean sprouts to eat. Liu Bei and Guan Yu were very surprised by his behavior.

Zhang Fei explained: I am from Nanhuashan, Xichuan. When I was a child, my family was poor and hungry. I have never tasted such fresh bean sprouts, so I can't resist its temptation. After listening to Zhang Fei's explanation, both Liu Bei and Guan Yu showed a knowing smile.

Although this story is just a folklore, it shows Zhang Fei's simple and open-minded quality by eating bean sprouts. Although Zhang Fei is a brave general, he is also a man full of human feelings and eager for food. This story has been passed down to this day because of its simplicity and true feelings, and it has become one of the most popular stories.

Characteristics of two-part allegorical sayings:

1, rhythm and rhyme: Xiehouyu is usually presented in the form of rhyme, which makes people sound smooth and rhythmic. This combination of phonology gives people a sense of music, which is easier to remember and spread.

2. Concise: Two-part allegorical sayings usually consist of two sentences, which express profound meanings in short expressions through clever meanings and metaphors. This refined language form enables two-part allegorical sayings to convey rich information in a simple sentence.

3. Humor: Two-part allegorical sayings often use antonyms, homophones and metaphors to express wisdom and playfulness in a humorous way. They usually have a pun meaning, which makes people feel wisdom and originality in a sense of humor.

4. Entertaining through education: Xiehouyu is not only a humorous expression, but also contains the meaning of entertaining through education, such as philosophy of life and moral education. Through humorous words to convey profound truth, people get thinking and enlightenment in laughter.