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The diaphragmatic breathing technique of health yoga: take a supine or comfortable meditation position or lie down, relax the whole body. Observe natural breathing for a period of time. Place your right hand on the belly button and your left hand on the chest. When inhaling, expand the abdomen outward to the maximum extent possible while keeping the chest still. When exhaling, contract your abdomen inward to the maximum extent possible while keeping your chest still. Repeat the cycle and maintain a consistent rhythm with each breath. Carefully experience the falling of the abdomen together. After a period of practice, you can take your hands away and simply focus on the breathing process with your consciousness.