Turtle breathing, also known as turtle breathing Dafa, Qigong retreat, internal breathing, fetal breathing and so on. Through specific breathing methods, the effects of health preservation and self-cultivation can be achieved. There are many cultivation methods in Buddhism, Taoism, yoga and other fields. There are specific turtle breathing techniques, so it is not convenient for me to generalize, and it is not difficult to breathe internally. It belongs to a cultivation method. I used to communicate with a tantric practitioner. Difficult people are not difficult, which means there is another mystery here. As for the magician's deep-water escape, it is not within our scope, because it belongs to another field.