What is borrowing cattle?

A man wrote a letter and sent it to a rich man, saying that he wanted to borrow Niu Yi. The rich man is meeting a guest. He couldn't read, but he was afraid that the guests would laugh at him, so he pretended to read the letter and said to the messenger, "I see, tell your master that I will go as soon as I get married."

The spark of wisdom doesn't know how to pretend to understand, can't pretend to understand, and will only joke for a moment's vanity. Instead, be ashamed to ask questions and enrich yourself.