卿 was a top echelon of officialdom in ancient China. Pre-Qin states had
六卿 (Six Ministers); Han re-organized them as
九卿 (Nine Ministers) below the
三公 (Three Excellencies). Emperors addressed individual ministers as
爱卿 (àiqīng, 'my dear minister') — a stock phrase in
古装剧 (period dramas) today.