疯子有傻子陪傻子有疯子伴
[fēng zi yŏu shă zi péi shă zi yŏu fēng zi bàn]
'A Madman Has a Fool for Company and a Fool Has a Madman for Companionship' depicts a close relationship between two individuals where they accept each other despite—or because of—any quirks or unusual traits they might have, finding mutual support within each other.