According to the Records of Nanle County, the former Chaocheng was located in Han Jang Jin, Nanle County, and was moved to Dupo Town in the second year of Song Dynasty (1033), which was also recorded in Shandong Tongzhi. According to the old records of Chaocheng, the circumference of the gate of Chaocheng is 3,500 meters, the wall is 9 meters high and 8.3 meters thick, the moat is 3 meters deep, the gate has piles and four gates have suspension bridges. 194 1 year, when the traitors occupied the city, they greatly strengthened the city and put iron plates on the doors. 1February, 944, with the cooperation of local armed forces, the Eighth Route Army captured Chaocheng and the city wall was demolished. After 1950, the facilities in the old city were gradually replaced by new buildings. The subgrade of Yufan Highway adopts the east wall foundation, and the subgrade of Chaoguan Highway adopts the south wall foundation. West "Ning" was transformed into Chaocheng Hospital; The East Gate "Shanxi Guild Hall" was built as Shenxian No.2 Middle School. The church bell tower built by Jesus Church and 1897 American and German churches has been well preserved so far. The building of the Catholic Church is now the Chaocheng Police Station. The mosque built in Guangxu period of Qing Dynasty is still a place for Islamic activities.