The ruins of the city wall of Beijing in the Ming Dynasty are not just one place. Located under the busy road of Fuxing Gate, Changchun Street and Tianning Temple interchange, a triangular green space has a residual wall of about three miles, which is more than ten meters high and has a broad platform at the top. However, it is surrounded by tall buildings, limited vision, not as far as the view. There is a stone tablet at the entrance of the ruins park. It briefly describes the three thousand years'experience of Beijing's city construction, and the important nodes are all explained. However, after the Cultural Revolution and at the beginning of the reform, Beijing expanded rapidly, and the city walls were suddenly demolished in one section, and they were taken over in one stroke. Mr. Hou Renzhi, the author of the inscription, is a well-known scholar of Beijing's urban history. He writes abundantly. He is reluctant to write more here. He must have his bitter feelings. Yes, the disappearance of Beijing's city wall is a regrettable thing. Walking after meals, walking and other cities, the summer is over, the heat dissipates, the breeze touches the face, feel cool and happy.