《黄帝内经·灵枢·九针论》
第八种针具，比象于八方之风，在人应于大腿和胳膊的肩、肘、髋、膝八处大关节。
八者，风也。风者，人之股肱八节也。
The eighth kind of acupuncture needle represents the eight winds and corresponds to the eight large joints in the legs and arms: the shoulder, elbow, hip, and knee.