1958 is a satellite commune, 196 1 established chengguan commune, 1984 was changed to chengguan town, and 1988 was changed to Ansu town. 1996 Nanzhangfeng Township and Daxigezhuang Township merged. 1997, with an area of 8 1.7 square kilometers and a population of1/0000. It has jurisdiction over Beiguzhuangying, Medieval Zhuangying, Nanguzhuangying, Beixiaguan, Neicheng Village, Nanguan, Cheng Nan, Hejiadian, Qingmiaoying, Shilipu, Huangtugang, Xiyuzhuang, Dongyuzhuang, Wangzhuang, Sanchakou, Jiaoling Bridge, Xiaoxinzhuang, Xiaosizhezhuang, Bath Village, Nanliyuan and Beiliyuan.