2. Precautions: 1) Don't practice squatting down to the thigh level from the beginning. Because of inaccurate movements, the muscles and bones have not adapted, and it is easy to get knee strain and injury. Start with a suitable middle viaduct. If you are older or physically weak, you can raise it first; 2) Choose 38, 48, or 56 routines, not too short, so that you will get bored quickly, not too long, and it is difficult to master at once, so that the practice effect is better; 3) Beginners must aim at exercise. Don't think about what they are doing. The difference is too far. The key is to find the right feeling. You'd better find a coach or teacher. If you want to pose correctly, you need the teacher to help you adjust the pile. You can't find that feeling yourself. Of course, if the purpose of your long-term practice is simply to keep fit, you can pay attention to correcting your posture, and you don't necessarily need to adjust piles.