The biggest advantage is that there are many opportunities in Beijing and Shanghai. Their average salary is high and they are under great pressure. They need more exercise to improve their physical fitness and relieve the pressure of life and work. So there are more opportunities in the fitness industry.
Guangzhou and Shenzhen have a certain cultural influence on leisure and health preservation, and the environment is also good (compared with the foggy days in Beijing and Shanghai). People have many ways to exercise, and they don't have to go to the gym.
Hope to adopt, thank you!