Introduction to the city tower: The Changle Gate (South City Gate) that people see today was later restored. It is more than 10 meters high and has 50-meter city walls on both sides. The city gate is divided into upper and lower floors. The "Changle Gate" plaque under the upper eaves was written by the famous calligrapher Qi Gong. Models of ancient weapons such as Qinglong Dao, snake spear, halberd, and stick are displayed below the gate. Walking on the city walls on both sides, you can see the remains of the original city wall outside the city; looking northward, you can clearly see the four towers of Zhengding.