I don't know exactly. When I was studying boxing in Chenjiagou, I heard from people there that a man named Zhang Hengyi opened a museum in Tianjin and was Chen Xiaoxing's apprentice. It should be the boxing gym that zfddgyf said.

As long as you are a serious boxer, there is no problem, mainly because you should pay attention to the following points:

1, be patient and meticulous-be sure to ask the master to adjust your waist, hips and knees when standing piles, winding silk and boxing frames. It is very important to experience and adjust more. Be patient, don't be afraid of trouble, and pay attention.

2. Relax-When you feel uncomfortable, ask yourself if you should relax there. Pay attention to relax the whole body, especially the legs, and check yourself more. Is there unnatural tension in some parts except the load-bearing muscles?

3. Nature-When you do an action, carefully analyze how this action best conforms to the law of your body movement.