Young trees will not grow straight without pruning, and people will become disobedient and stubborn regardless of teaching. "Young trees can't grow straight, and people can't repair them" is a common saying, which literally means that young trees can't grow straight without regular pruning, and people will become disobedient and stubborn without regular discipline. This proverb is often used to emphasize the importance of education and management. Through education and management, people can become more sensible and obedient, just as pruning small trees can grow straighter.