(literary) collective name for the highest-ranking graduates of the three levels of imperial examinations in ancient China, specifically the 解元 jiè​yuán, 会元 huì​yuán, and 状元 zhuàng​yuán

A winning hand in mahjong containing triplets or quadruplets of all three dragon tiles: 红中 hóng​zhōng, 青发 qīng​fā, and 白板 bái​bǎn