know one's business

know one's business

As a Chinese idiom, Pinyin is d ā NGH á NGB ě ns è, which means expert and original appearance. It comes from qulv zalun by Wang Jide of Ming Dynasty.

Idiom usage

As an object or attribute; used in composition, etc

The origin of Idioms

In Wang Jide's qulv · zalun of Ming Dynasty, "the way of Zen lies in witticism, so does the way of poetry. But understanding is to do what is right, and it is to be true. "

Analysis of Idioms

Be good at what you do