Don't. Gym refers to a place for fitness, rehabilitation and exercise activities. Because the commercial body is a combination of three or more functions of urban living space, such as business, office, residence, hotel, exhibition, catering and conference. There is no need because people who go to work leave early and return late and have no time to exercise in sports venues. Urban complex is a "city within a city" based on architecture, which integrates five core functions: commercial retail, business office, hotel catering, apartment and comprehensive entertainment.