Caotan 7 road. According to Baidu map, Zhong Da Tong Yuan Cable Xi 'an Warehouse is located in the Weiwei Group reservoir area of Caotan No.7 Road and Shangji Road in Xi 'an City. Zhong Da Tong Yuan wire is a kind of wire commonly used in building electrical engineering, which has excellent heat resistance, high temperature resistance, good heat resistance, difficult aging and deterioration, and long service life.