Sun Simiao, a famous doctor in the Tang Dynasty, advocated “knocking your teeth three hundred times in the morning”. A long-lived man named Leng Qian of the Ming Dynasty lived to be 150 years old, and his experience of longevity was to “knock on his teeth 36 times every morning when he woke up.” Su Dongpo, a great poet of the Song Dynasty, also had the habit of knocking his teeth for fitness. He once said, “Once after midnight, drape your shirt and face southeast, sit cross-legged and knock your teeth thirty-six times, when you will be refreshed.” Qianlong Emperor is the longest reign of the Qing Dynasty, the longest-lived emperor, one of the secrets of his longevity is also “teeth should always knock”. Knock on the teeth and swallow the Jin, since ancient times, “knock on the teeth and swallow the Jin health care method” is one of the important health care techniques of traditional Chinese medicine. The ancients believed that healthy teeth make a healthy body and a healthy body makes a long life. According to the literature, one thousand four hundred years ago when the Emperor Wu of Liang medical doctor Tao Hongjing, over eighty years old, the teeth are intact, the body is strong, his main method of fitness is knocking teeth method. He believed that “the teeth are the rest of the muscles and bones” and that knocking on the teeth would make the muscles and bones stronger and the spirit more refreshing. An ancient proverb says, “In the morning, knock on your teeth 300 times, your teeth will be strong”.