1 cun anterior to Yuanye GB-22, approximately level with the nipple
How to locate
Abducting the arm slightly and find the axilla apex. Then measure 3 cun inferior to it in the 4th intercostal space and locate Yuanye GB-22.
The 4th intercostal space is in level with the nipples, which is more obvious to identify for men. For women, it is more reliable to use manubriosternal synchondrosis as reference.
Zhejin GB-23 is 1 cun anterior to Yuanye GB-22.