(1635 ~ 1704) philosopher in the early Qing dynasty and founder of Yan Li school. The original word is easy to be straight, and it was changed later, so it is called Xizhai. Boye people in Hebei. In his early years, he embraced the ambition of statecraft, read historical books and military books, and yearned for the rule of three generations in ancient times. After the age of 24, he believed in Wang Lu's philosophy, and then he turned to Zhu Cheng's neo-Confucianism (see neo-Confucianism). By the middle of the year, Wang Xue of Cheng Zhulu was abandoned and learning was advocated. Since then, I have been studying, advocating practicality and paying equal attention to learning and doing. His academic fashion of attaching importance to practice and being practical had a positive influence on the formation of simple style of study in the early Qing Dynasty. Yan Yuan attached great importance to the role of education and put forward the idea of "the original place is in school". Liu De, Liu Xing, Zhou Gong Liu Yi and Confucius all advocated the education of students. In his lecture hall, there are harps, spears, bows, arrows, films and pipes, which lead students to learn etiquette, music, shooting, books and figures every day and explore practical knowledge such as war, agriculture, fire and water. In his later years, he was employed as a lecturer at Zhang Nan College in Feixiang, formulating articles of association and setting up subjects such as literature, military equipment, classics and history, and artistic talent. After the academy was flooded, it returned to its hometown. He died in the 43rd year of Kangxi (1704). Yan Yuan's learning, called retro, is actually his own creation. His practical thought was inherited and carried forward by his student Li B, and formed an influential school in the academic history of the early Qing Dynasty. Historically, it was called "Yan Li School". Yan Yuan didn't take writing as his career all his life, and his main works are Si Cun Bian and Xi Zhai Yu Ji. Punctuation marks of Si Cun Bian by Zhonghua Book Company 1957.