Breathing training is a very effective way to relax and clear the brain. Here are some steps to help you clear your mind through breathing training. 1. Find a quiet place to sit or lie down. Relax and close your eyes. 2. Pay attention to your breathing. Take a few deep breaths and feel the air coming in and out of your body. 3. Focus on the process of breathing. Observe every breath in and out intently, without thinking about anything else. When you breathe, start to relax every part of your body. Starting from the head, gradually relax the facial muscles, and then relax the neck, shoulders, chest, back, abdomen, arms, legs and feet. When you feel completely relaxed, turn your attention to the thoughts in your mind. Pay attention to the thoughts and emotions that appear in your mind, but don't get caught up in them. 6. Turn your attention back to breathing. Whenever you find yourself lost in thought, gently bring it back to your breath. 7. Continue to relax, focus on breathing, and let your thoughts gradually calm down until you feel completely empty. Through frequent breathing training, you can learn how to clear your brain better. This method can help you reduce stress and anxiety, improve attention and concentration, and improve your overall physical and mental health. Take some time to do this breathing training every day, and gradually you will find that your thoughts are clearer and calmer.