牽牛鼻子

Simplified: 牵牛鼻子

qiānniúbízi ㄑㄧㄢ ㄋㄧㄡˊ ㄅㄧˊ ˙ㄗ

    • to seize the crux of a problem
    • to grasp the key link

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
lead the ox by the nose
Meaning
To seize the crux or key link of a problem.

Sources