When a person is about to pass away, he or she suddenly appears in a state that is not consistent with his or her condition, such as having no energy in the eyes, lying in bed, not being able to eat, having a poor mental state, and having a declining, sickly complexion. However, when the light returns, the eyes are suddenly bright, the face is rosy, the cheekbones are flushed, the spirit is suddenly able to speak, and more words are spoken. Suddenly, they want to eat and see their family members. The original reaction is very slow, but at the time of returning to light, it will suddenly behave very excited and uplifting. This situation indicates that the person is returning to light and the condition may be aggravated immediately. According to Chinese medicine, when there is a deficiency of essence, the last moment of all the remaining essence in the body will make a final struggle and show a false appearance. Western medicine research believes that before a person is about to die, all hormones will be secreted for the last time, showing these illusions.