This sentence comes from Huangdi Neijing. Huangdi Neijing was written by an ancient physician in the name of Huangdi, and was jointly created by physicians and medical theorists. It is generally believed that it was written in the Spring and Autumn Period and the Warring States Period. It is one of the four classic works of China's traditional medicine (Huangdi Neijing, Difficult Classic, Treatise on Febrile Diseases and Shennong Materia Medica), and it is the earliest existing medical classic in China's medical treasure house: Item C, "Husband, walking between heaven and earth, has encountered countless times in his life, and has no regrets", which means life.