The university campus in my mind is a green campus. The green here is not only the color, but also the green at first. Before I entered the university, the university campus in my mind was full of green grass and towering old trees. On the other side of the wall, students are sitting around the broad lawn, enjoying the sunshine, talking about ideals and discussing academics. Entering the school gate, two rows of tall trees reveal the profound connotation and long history of an institution of higher learning. But the reality is not exactly what I imagined. There are trees, but their shapes and feelings are different. In my opinion, the beauty of the campus is largely due to the trees. "A man sat under a tree and talked with several other people about his ideas. The speaker does not know that he is a teacher, and the listener does not know that he is a student. The students were so absorbed that they were surprised. If only this man could stay. So they drew a place in that position, and the first school in the world was born. " (Louis Kahn). In the eyes of architects and planners, what must a university have? In addition to masters, big trees are also essential. If there are no trees and green around, even the best buildings will be eclipsed. And different styles of buildings can be unified in a generous green system. With trees and Woods, there is a landscape of exercising in the trees in the morning and reading early in the green trees; With trees and Woods, there are magical patterns in which warblers sing at the top of trees in early spring, cicadas sing in the shade in summer, golden laurels spread fragrance in the distance in Mid-Autumn Festival, and moonlight weaves on the ground in winter night. I have been to Tsinghua campus many times. The most rewarding thing was to accompany President Wen to visit Professor Miao Rixin in Tsinghua two years ago. Professor Miao is an old Tsinghua who has been engaged in campus planning and construction for a long time. He is quite proud of an article "The Changes of Tsinghua Campus in Ninety Years", which has attracted many visitors on the campus network in Tsinghua. Professor Miao showed us around the Tsinghua campus, explained the buildings and gardens on campus one by one, and had the I-hall where President Tsinghua worked specially opened. The beauty of Tsinghua campus is well known. Her beauty lies not only in architecture, but also in gardens and trees. Trees are very noble in Tsinghua. No one can touch them and they will never bow to anyone. People come and go, buildings rise and fall, and trees don't move. This tradition has been well inherited. Not long ago, I watched Shen Junshan's Stories of Trees in Tsinghua in the Southern Weekend. It said that in the early 1970s, Tsinghua University in Hsinchu, Taiwan Province, wanted to cut down an old banyan tree because of building an auditorium. The radical professor tied himself to the tree and vowed to protect it. I also made up a tree-protecting song: "The greatness of a university lies not in its architecture, but in its masters. It's hard to find a master, so plant a big tree. Big trees are hard to grow, so protect them! "Later, the tree was removed and replanted, but it failed to survive after all, leaving only a stump for future generations to remember. Seek adoption