High temperature cannot act on human surfaces and internal organs. Killing the novel coronavirus requires at least 56°C and 30 minutes and is commonly used for disinfection of surfaces. The human body will maintain its body temperature in a normal range through heat production and heat dissipation. If the body temperature reaches 56 ℃ for half an hour, the person will not only kill the virus, but also kill the normal tissues and cells of the body, which is a great damage to health. In addition, drinking too hot water will cause damage to the esophagus and stomach, which may be complicated by gastric ulcers, gastric bleeding and other diseases, or even cause other more serious complications.