Introduction to Guancheng: Yanmen Pass consists of three parts: Guancheng, Wengcheng and Besieged City. Around Guancheng and at the foot of the mountain, there are also Guancheng, Dongcheng Bingpan, Xicheng Bingpan, Dianjiangtai, Liulang City, Xinguangwu There are more than 60 Ming Dynasty ruins and relics such as the old Guangwu City and the old Guangwu City, which together form the defense system of Yanmen Pass.