Which express is the cheapest from Dazhou to Deyang?

Postal express. Postal express is the cheapest of all express delivery, and users can send it by postal express. Dazhou, known as Tongzhou in ancient times, is located in the southwest of China, in the hills in the east of Sichuan Basin and in the parallel ridges and valleys in the east of Sichuan. It has an archaeological history of nearly 5,000 years and an organizational history of more than 2,300 years. Users can operate according to navigation instructions.