True power, the name of ancient doctors. Physicians in Tang dynasty. Xuzhou Fugou (now Henan) people. His brother Zhen Liyan studied medicine because of his mother's illness. Later, in the name of a doctor, he was awarded the age of 103 for his fine acupuncture and good health preservation. Emperor Taizong went to his house to consult the medicinal properties and gave him clothes, some sticks and a doctor according to his diet. His works include Records of Ancient and Modern Prescriptions, Notes on Acupuncture, Tang Ming's Human Form, Acupuncture Prescriptions and Pulse Classics, all of which have never been published in the world.