把關口

Simplified: 把关口

bǎguānkǒu ㄅㄚˇ ㄍㄨㄢ ㄎㄡˇ

    • to stick to principles and check strictly to prevent errors

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
guarding the pass
Meaning
Sticking to principles and standards and checking strictly to prevent errors. Approving.

Sources