Introduction to the Summer Palace: There is the Summer Palace to the south of Baijin Taozhai. The couplet on the door reads "Retire and reflect on past mistakes, and still study sometimes." Various precious Chinese herbal medicines are planted in the garden, such as wolfberry, Eucommia ulmoides, and Mao Zedong. Holly, plantain, Houttuynia cordata, salvia, etc. are all available. Sun Yirang established industry to save the country, abandoned old ideas and advocated applying what he learned. He taught students to pay attention to practice and asked them to plant herbs, so he promoted reading in the front and planting in the back.