qián​bù​jiàn​gǔ​rén​hòu​bù​jiàn​lái​zhě

unprecedented

前不见古人,后不见来者 前不見古人,後不見來者 qián​bù​jiàn​gǔ​rén​hòu​bù​jiàn​lái​zhě
unprecedented
Literally meaning "before, I do not see the ancients; behind, I do not see those yet to come," this idiom describes something unique, unsurpassed, or completely unprecedented.