Quchai qū chāi · 曲差

Location. On the head, 0.5 cun directly above the midpoint of the anterior hairline and 1.5 cun lateral to it, at the junction of the medial and middle thirds of the line joining Shenting (GV24) and Touwei (ST8).

One of the head points on the Bladder line; classical descriptions place it at the turn where the channel bends toward the vertex.