进宫

to enter the emperor's palace / (slang) to go to jail

to go forward / to advance / to go in / to enter / to put in / to submit / to take in / to admit / (math.) base of a number system / classifier for sections in a building or residential compound

surname Gong

palace / temple / castration (as corporal punishment) / first note in pentatonic scale

name of a famous opera / (slang) to go to jail for a second offense

(slang) to have served several sentences / recidivist / old lag