1. Chen Zhonghe, the coach of the Chinese women's volleyball team, has very strict requirements on the women's volleyball girls. Under this kind of training, the women's volleyball players have high ambitions and have achieved good results one after another. 2. As the saying goes: "A strict teacher will produce a good disciple." There is also an old saying that "If the teacher is not strict, the teacher will be lazy." The personality charm of a teacher is important, but what is more important is to be a strict teacher. A teacher must be strict, and those who deserve punishment must be punished, so that there can be good disciples. 3. Yu Shinan was a great calligrapher in the early Tang Dynasty. Emperor Taizong of the Tang Dynasty praised him and said: "If you are proficient in one of these, virtue, loyalty, erudition, literary poetry, and calligraphy, you can become a famous official. But Yu Shinan has the strengths of all five." "Chu Suiliang learned calligraphy from Yu Shinan as his teacher. With the guidance of famous teachers and personal efforts, Chu Suiliang made rapid progress. Many people praised him, and he himself was complacent. One day, he asked Yu Shinan: "Can my calligraphy be compared with that of senior Zhiyong?" Yu Shinan said: "Zhiyong studied calligraphy for forty years and did not go downstairs. He retired his calligraphy and turned it into a tomb (zhǒng). Only his ancestor Wang Xizhi can compare with him. "Compared." Chu Suiliang went to ask Wei Zheng again, and Wei Zheng wrote him sixteen characters: "Take advantage of others' strengths and avoid their shortcomings; promote your own strengths and overcome your own shortcomings." Chu Suiliang was deeply enlightened and worked hard after returning. He practiced calligraphy and finally became a famous calligrapher in the early Tang Dynasty. 4. Ji Chang learns archery 5. Strict teachers produce talented disciples, and harsh competition produces powerful wolves, war horses and nations. 6. A strict teacher will give birth to a great disciple, and he will gain the true meaning by focusing on the Tao.