[Discussion on the issues of time recorded in Lingshu: Weiqixing ].

Lingshu: Weiqixing (the Chapter 76 of Miraculous Pivot ) states the running course and time of the defensive qi circulation, as well as the needling techniques of acupuncture for waiting for qi arrival. However, because of the conflicts on the time system of acupuncture in the record, it is hard to be adopted in clinical practice in the later generations. In comparison of the 28-lunar-mansion time system with the clepsydra time system, it is known that the 28-lunar-mansion time system is much more rational because the clepsydra system is the tool for counting rather than timing. Hence, in compliance with the original meaning recorded in Lingshu: Weiqixing , the method for estimating the circulation of defensive qi is re-collected so as to provide a new approach to the study on the needling techniques of acupuncture for waiting for qi arrival.