攀龙附骥
pān​lóng​fù​jì

to ride the coattails of a great leader

  1. 攀 pān
    to claim connections
    To try to associate with people of higher social status; to seek connections in high places
  2. 龙 龍 lóng
    eminent person
    a person of great talent or status; a hero among men
  3. 附骥 附驥 fù​jì
    to ride on someone's coattails
    (literary) to attach oneself to a famous or successful person in order to gain fame or success; also used as a polite humble expression when collaborating with others