Yangguan (DU18) is located in the intervertebral space below the spinous process of the sixteenth lumbar vertebra. It should be accessed while sitting. The needle is inserted to a depth of five fen, and moxibustion consists of three moxa cones.
Yaoshu (DU20), referred to as "Yao" in the text, is located in the depression at the intervertebral space below the spinous process of the twenty-first lumbar vertebra. To locate this point, one should lie prone with the body straightened and extended, place both hands stacked under the forehead for support, and fully extend and spread the four limbs. Only then can the point be accurately located through precise palpation.