A traditional name for an imperial examination official; based on a legend that a red-robed figure sat behind the examiner [[欧阳修|歐陽修|ou1 yang2 xiu1]] and nodded to approve successful essays.

To pass a high-level imperial or academic examination; literally "the red-robed official nods his head."

to be successful in the imperial examinations; literally the red-robed god nods his forehead to signify approval