Breathing adjustment is breathing adjustment. For example, postural breathing is intended to expel evil spirits through the pores of the whole body, or it is called "exhaling and nourishing the heart" in the qi-moving method. In fact, the role of breathing is not very important, and it may even cause mental tension and unnatural, leading to poor qigong posture and anxiety.
Self-adjustment is what you think in your heart and what your brain thinks. For example, keep your mind, visualize yourself in the true qi of the universe, inhale when inhaling, expel when exhaling and so on. The most important thing is to adjust the heart, but the key to adjusting the heart is to call the subconscious mind, and the surface consciousness has little practical effect. The operation of human meridians is mainly influenced by the subconscious mind.