A: In order to cultivate "people with practical learning and virtue", Yan Yuan put forward the educational content of "practical learning". (1) Practical learning education content: The education content will be "Three Things, Six Institutes and Three Things" centered on Six Arts. Its characteristics are: opposing valuing literature over martial arts, and advocating both civil and military skills; Oppose getting something for nothing and advocate labor education. (2) "Six lent" teaching: ① Literature lent: classes, music, books, mathematics and other subjects; 2 Zhai: teaching the art of war and tactics. (3) History of Classics: Thirteen Classics, History of Past Dynasties, Patent System, etc. ; 4 Yi Nengzhai: Teaching water science, fire science, etc. ⑤ Neo-Confucianism: meditation, editing, learning process, Zhu, Lu and Wang; ⑥ Tiekuo Zhai: Take the eight-part essay as an example. "Liuzhai" teaching has formally incorporated many natural science and technology knowledge, various military knowledge and skills into the teaching content, and set up teaching in different categories, which contains the bud of modern courses and has far-reaching influence.