Beijing AREACODEBeijing010 Shanghai AREACODEShanghai021 Tianjin AREACODETianjin022 Chongqing AREACODEChongqingi023 Hebei AREACODEAREACODEAREACODEShijiazhuang0311Handan0310Baoding0312Zhangjiakou0313Chengde0314Tangshan0315Langfang0316Cangzhou0317Hengshui0318Xingtai0319Qinhuangdao0335 Shanxi AREACODEAREACODEAREACODETaiyuan0351Datong0352Yangquan0353Yuci0354Changzhi0355Jincheng0356Lishi0358Yuncheng0..