In the muscle groove between musculi longissimus dorsal and iliocostalis，lateral to the tip of the transverse process of the 2nd lumbar vertebra.Bilateral (Figs.106，107;40#).Perpendicular insertion.Filiform needle 1-3cm，or moxibustion with mugwort.Indications：Nephritis，polyuria，hypogonadism impotence，rheumatism of the and loin，sprain pain of the loin.