Lao Liang is just telling stories, and he talks nonsense most of the time. Because ghosts don't have visible bodies, people can't see them, but photos or cameras can occasionally be taken. Buddhism has a special classic to explain the principle and method of feeding hungry ghosts. I also heard Lao Liang say that there is no internal work in the world, and internal work is physical exercise. This is complete nonsense. Internal strength is the advanced energy possessed by the human body after long-term qi and blood operation and energy sublimation. It can nourish the body, contribute to people's treatment and be used in martial arts. It can make people feel that the internal strength is huge and the internal strength is good. Being hit by high-voltage electricity can make people unconscious in an instant.