Zheng bought shoes for people.

Buying shoes by Zheng people is an idiom, an allusion and an allegory. It tells the story that Zheng Canren doesn't buy shoes because they believe in "scale" too much. It tells people to seek truth from facts, be flexible and not stick to dogma.

Ye Gong Long Hao is an idiom that tells the story of Ye Gong's addiction to dragons. After being known by the real dragon in the sky, he descended from the sky and came to Ye Gong's home. When Ye Gong saw that it was a real dragon, he turned and ran away in fear, as if he had lost his soul. Metaphor looks like something on the surface, but it doesn't. It's derogatory.

I hope my answer can help you.