bù​shí​tài​shān

not to recognize a famous person

  1. to not recognize
    To be unable to distinguish or identify; to not know someone or something.
  2. person or thing of great importance
    (metaphor) A person of great distinction or something of immense weight or value; used in the idiom 有眼不识泰山 yǒu​yǎn​bù​shí​tài​shān meaning to fail to recognize a person of great importance.