Source: The Analects of Confucius, a disciple of Confucius in the Spring and Autumn Period. It means to study hard and not be satisfied. Teach people tirelessly: teach students never to get tired. Learning is not enough, teaching is not tired.
Confucius' achievements:
1. Ideologically, Confucius put forward the theory of "benevolence", advocated "love", and asked the rulers to observe people's feelings, cherish private capital, "govern the country by virtue" and oppose tyranny and arbitrary punishment.
2. Education: starting a private school, regardless of family background and wealth, recruiting disciples. He trained 3000 students, paid attention to "teaching students in accordance with their aptitude" and was good at inspiring students to think. Educate students to have an honest learning attitude and be open-minded and eager to learn. Ask students to review what they have learned from time to time, so as to "review the old and learn the new".