滥竽充数 (làn yú chōng shù): lit. to play the yu 竽 mouth organ to make up numbers ; fig. to make up the numbers with inferior products; to masquerade as having an ability; token member of a group

lànchōngshù

lit. to play the yu 竽 mouth organ to make up numbers ; fig. to make up the numbers with inferior products; to masquerade as having an ability; token member of a group

A man who could not play hid in a 300-piece ensemble until asked to solo. For padding out a number with someone who cannot do the job.