| 关节 | guān jié | joint (physiology) / key point / critical phase | ![]() |
| 要害 | yào hài | vital part / (fig.) key point / crucial | ![]() |
| 基本点 | jī běn diǎn | key point / crux / (finance) basis point, abbr. to 基點|基点[ji1dian3] | ![]() |
| 牛鼻子 | niú bí zi | key point / crux / (old) Daoist (facetious) | ![]() |
