Keep young. It is said that you can maintain your youthful appearance for decades or even hundreds of years after practice. Although it is mentioned in many unofficial history's notes and martial arts novels, there is no detailed description of the cultivation steps and tricks of his techniques. Generally, men take "collecting yin and nourishing yang" as the way to stay in beauty, while women need to live alone in a certain place and practice for many years before they can practice. After women's beauty skills are successful, they are generally taboo, or they can't get married and have children. In Gu Long's "Jiao Jian", Zhu Mei, a skilled master of the Magic Palace, has mastered the art of studying in the United States, and even mastered the art of touching the bed, which makes the romantic men in the world less eager. But her kung fu is forbidden to have children. After Zhu Mei was lovelorn, she gave birth to a daughter for Oriental Meiyu. In less than half a year, an absolutely beautiful beauty is skinny and looks dozens of years older. In other swordsman's works, there is also a story about a woman who has the ability to stay on her face. Once she died, her face changed immediately, and she became an old woman, just like Bai in The Journey to the West. These are all the words of novelists, which are not to be believed. In history, Taoism is the most diligent in pursuing longevity and immortality. In early Taoism, alchemy and medicine were the main ways to explore immortality. Later, he gradually turned to pay attention to the cultivation inside the human body, and used Qigong to "refine the alchemy" in the body, and achieved the goal of health and longevity through the realm of "double cultivation", and even achieved the goal of becoming immortal and soaring.