有眼不識泰山
yǒu​yǎn​bù​shí​tài​shān

to fail to recognize a great person

Senses

有眼不识泰山/ 有眼不識泰山 yǒu​yǎn​bù​shí​tài​shān (also yǒu​yǎn​bú​shì​tài​shān) to fail to recognize a great person

(idiom) literally "to have eyes but fail to recognize 泰山 tài​shān"; used to apologize for being ignorant of someone's high status, great talent, or importance

References

see 有眼不识泰山/有眼不識泰山 → 泰山/泰山
see 泰山/泰山 → 有眼不识泰山/有眼不識泰山