Du, calf; bi, nose.
The depression on both sides below the dneecap are likened to the nostrils of a calf.
The point is at the external foramen.
Bend the knee at the lower border of the knee cap, in the depression lateral to the patellar ligament.
For diseases of the knee joint and the soft tissues.
Puncture obliquely backward and to the medial side around 0.8-1.2 cun