앞가슴부위, 앞정중선(anterior median line) 위, 셋째 갈비사이공간(the 3rd intercostal space)과 같은 높이.

In the anterior thoracic region, at the same level as the 3rd intercostals space, on the anterior median line.

- 直刺 0.2～0.3寸
- 斜刺 0.3～0.5寸 (下方으로 향해 皮下를 沿해 刺入)