博大精深

bó dà jīng shēn

wide-ranging and profound

Character by character

博bó
broad

大dà
great

精jīng
fine

深shēn
deep

中国文化博大精深。

Chinese culture is vast and profound.

Tone: positive (praise).

Mostly for cultures, traditions or fields of learning, rarely for one person.

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This idiom and thousands more are in Learn Chinese with Bao, with audio, pinyin and drills that make them stick.