400 meters. Hanan industrial new city is an important part of Harbin's strategy of "leaping north and expanding south to rejuvenate and strengthen the county". Its industrial orientation is to build an important demonstration area of national new industrialized industries and an important national transportation equipment manufacturing base with aviation and automobiles as the mainstay. According to relevant data, the report of Citizen Fitness Square is 400 meters in length and 5 meters in width, which can be used for five people to run at the same time. The square racetrack consists of polyurethane prepolymer, mixed polyether, waste tire rubber, EPDM particles or polyurethane particles, pigments, additives and fillers.