10 1 10 1。 According to the postal code database, the postal code of the secondary canal in Taihu Town, Tongzhou District, Beijing is1011,which can be used in all areas under the jurisdiction of the secondary canal. The second canal is located in the southeast of Beijing and the southwest of Tongzhou City, close to the Beijing-Tianjin Expressway, connected to Chaoyang in the north and close to Fatou Industrial Zone.