Puncture perpendicularly 0.7-1.0 inch.
With the knee flexed and supported by a rolled pillow. 1. Perpendicular insertion directed towards Weizhong BL-40 1 to 2 cun. 2. Oblique insertion in a medial and superior direction behind the patella 1 to 2 cun. 3 Behind the patellar ligament to join with medial Xiyan (MN-LE-16).