HSK 7-9
前无古人
qiánwúgǔrén(idiom) unprecedented; unheard of
他的壮举可谓前无古人。
Tā de zhuàngjǔ kěwèi qiánwúgǔrén.
His feat can be described as unprecedented in history.
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Appears across levels (7-9) in the HSK 3.0 word list.