When you punch, you should master the center of gravity of your body. A straight left fist is standing in the same place and punching a left fist. If you punch with your right fist, you need to push your right foot to the ground, then turn your hips (buttocks) and punch straight with your right hand. The same is true of swing, but whether it is left swing or right swing, you need to rotate your crotch to drive your own weight to raise your strength to a higher level. You need to understand the footwork yourself. I jump 1000 times a day to practice footwork. I have to jump back and forth and focus on ankle strength. Only in this way can I practice my footwork.