哭到全世界都憔悴笑到全世界都流泪
[kū dào quán shì jiè dōu qiáo cuì xiào dào quán shì jiè dōu liú lèi]
Describes emotional extremes - crying to a point where everything seems to be as withered and worn out as oneself, yet laughing intensely to evoke tears. It shows deeply contrasting and profound feelings.