From the clepsydra of Suwen·Liuweizhi Dalun,this paper discussed the origin of the clepsydra,the principle of recording time of the clepsydra,the division of the Han dynasty time and hour system,the history of the time system and the scholar's views on thestarting time of Liuqi.Finally,it is clear that the time system of five circuit phases and six atmospheric influences theory pays more attention to the clepsydra time system,which is synchronized in parallel with Han dynasty the sixteenth periods in the Huangdi Neijing.Doctors after the Tang dynasty's interpretation of the starting time of Liuqi is based on the conversion system of the time system developed after the Southern and Northern dynasties.
Five circuit phases and six atmospheric influences theoryHuangdi NeijingLiuweizhi DalunClepsydraTime systemStarting time of LiuqiTime system