School: an old private teaching place. It's usually called a private school. In the Western Zhou Dynasty, a local primary school, The Book of Rites? Yukime: "Teacher Gu has a school at home." Han Zheng Xuan's Note: "In ancient times, people who were just officials were taught in Lu Li and sat at the door day and night. The hall next to the door was called a school." Tang Kong Yingda said, "Within a hundred miles of Li Zhou, there are 25 households in the same lane, with a gate at the head and a school next to it. The people are at home, going in and out day and night, and always teaching at school. "

Zhou Xu: an ancient local school. Later it was also called school. Hanshu? Biography of Dong Zhongshu: "Establish a university to teach the country, establish an emergency order, and turn it into a city." Li Dazhao warned ethnic elders: "Students are angry and chaotic, and businessmen are clamoring." "Mencius? On: School, Xu, Zhou Yueyao. "

Therefore, Shu, Yao and Xu should all be rural studies, not Chinese studies (universities, Chinese studies).