Introduction to the city gate: Qingyan Ancient Town is surrounded by city walls, which are divided into an inner city and an outer city. They are built with huge square stones. The city walls are equipped with watchtowers, crenels, and forts. There are 4 main streets, 26 The small streets and lanes are filled with quaint ancient buildings, including 3 stone archways and dozens of buildings, platforms, pavilions, pavilions, temples, temples, palaces, ancestral halls, pagodas, courtyards and former residences of celebrities. The magnificent Dingguangmen Gate Tower, the ancient stone road and the ancient archway complement each other and are the essence of ancient architecture.