Chaoyang west road, tongchuan district. Dazhou, formerly known as Tongzhou, is a prefecture-level city in Sichuan Province, a natural gas energy and chemical base in western China, and a transportation hub at the junction of Sichuan, Chongqing, Hubei and Shaanxi. According to Baidu map, the postal parcel workshop in this area is located in Chaoyang West Road, Tongchuan District, which is the work area for packaging and express delivery. Postal service is a communication department managed by the state or directly engaged in delivering all kinds of mail, which has the characteristics of communicating officials, businessmen and people.