Chinese

		dragons and snakes; good and bad people	to mix; to mingle
trad. (龍蛇混雜)		龍蛇	混雜
simp. (龙蛇混杂)		龙蛇	混杂
Literally: “dragons and snakes jumbled together”.

Idiom

龍蛇混雜

1. good and bad people mixed up; wise and unwise huddled together