There are two versions: 1. Confucius said: The winner has three friends, and the loser has three friends. It is mentioned that you should listen to more friends, and making friends with knowledgeable people is always beneficial to improve your moral quality. Ding Bai refers to a civilian with no fame, and generally refers to a vulgar person. Although we should not be partial, it is better to pay less people who will affect our words and deeds.

2. Discrimination against the poor working people, Ding Bai just didn't go to school and was poor. Many great men were Ding Bai when they were children, and they had no money to study.

But to learn from the former statement shows that the author likes to make friends with people with extensive cultural knowledge.