Yu, fish; ji, border.
The muscular flexor, pollicis in the palm is prominent as fish, the point is located just at its border Yuji(chenar) is used as an anatomical word at present.
On the midpoint of the 1st metacarpal bone, at the junction of the red and white skin.
cough, hemoptysis, sore throat, aphonia, fever.
Perpendicularly 0.5-0.8 cun.