For example, Lu-9 identifies the 9th acupuncture point on the lung meridian. The only ambiguity with this unique systemized method is on the urinary bladder meridian, where the outer line of 14 points found on the back near the spine are inserted in one of two ways; following the last point of the inner line along the spine () and resuming with the point found in the crease of the buttocks (), or following the point in the center of the crease of the knee () and resuming with the point just below that (), found in the bifurcation of the gastrocnemius muscle.
This illustrates Lu-9's identification of the 9th acupuncture point on the lung meridian. The sole ambiguity in this method is at the urinary bladder meridian, where the outer line of 14 points can be inserted in one of two ways: along the spine and then at the buttock crease, or via the knee crease and then at the gastrocnemius muscle bifurcation.