From Han Yu's "Teacher's Theory": "Teaching and learning have priority, and the technical profession has specialization". It means that the truth we know is the first, and the academic research of skills has its own research direction.
Shi Shuo is an argumentative essay written by Han Yu, a writer in the Tang Dynasty. Explain the truth of learning from teachers, satirize the world where teachers are ashamed, educate young people, and play a role in changing the atmosphere. This paper lists positive and negative examples, compares and demonstrates repeatedly, discusses the necessity and principle of learning from teachers, criticizes the bad habit of "being ashamed to learn from teachers" in society at that time, shows extraordinary courage and fighting spirit, and also shows the spirit of expressing opinions independently regardless of the secular.