It is generally believed that Peng Zu is the oldest person in history, and both Mandarin and history books record that he lived 800 years. Peng Zu was the great-grandson of Zhuan Xu among the five ancient emperors. He experienced three dynasties: Yao and Shun, Xia and Shang, and he was 767 years old when he arrived in Zhou Wang at the end of the Shang Dynasty. According to legend, he lived for more than 800 years, and he was the one who knew the best way to keep in good health and lived the longest. His regimen was compiled into Peng Zu Classic by later generations.