HSK 7-9
博大精深
bódà-jīngshēn(idiom) wide-ranging and profound
中国书法艺术博大精深。
Zhōng guó shū fǎ yì shù bó dà jīng shēn.
The art of Chinese calligraphy is wide-ranging and profound.
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Appears across levels (7-9) in the HSK 3.0 word list.