"Education without class" is a viewpoint put forward by Confucius, which means that no matter who is educated. Experts pointed out that Confucius was a great educator in ancient China. In the past years, knowledge related to him often appeared in the form of multiple-choice questions. His famous educational sayings include "teaching students in accordance with their aptitude", "learning is close, learning is far away", "being knowledgeable in writing, taking courtesy as its purpose", "learning without complaining, not being upset", "learning without thinking is useless, thinking without learning is dangerous" and "learning from the old is new".