Dazhou Tongchuan District Deep Breathing Fitness Center. Dazhou Tongchuan Deep Breathing Fitness Center is located at No.6, Floor 26, Block A, Binjiang Duming City, the central square of Tongchuan District, Dazhou City. Dazhou, formerly known as Tongzhou, is a prefecture-level city in Sichuan Province, a natural gas energy and chemical base in western China, a transportation hub, a cultural and commercial center and an ecologically livable regional central city at the junction of Sichuan, Chongqing, Hubei and Shaanxi.