[Study on meridians and collaterals through ying-qi and wei-qi]

Assisted with inference, and approved by the ancient medical classics, it is concluded that meridians and collaterals are often felt in the form of qi through imitation of the methods of life experiencing of the ancient people. Ying-qi is considered as jing-qi (meridian qi), which originates from the experiences of respiration. And wei-qi relates with experiences of sleep. Part of meridian theory originated from the traditional Chinese thought of seeking the internal cause but not the external manifestations, and paying attention to the self-adjustment, accomplishment and comprehension. It is also believed that the theory of ying-qi traveling inside the meridians and wei-qi outside the meridians is based on the theory that needling sensation has close relationship with wei-qi.