笑到全世界都流泪哭道全世界都憔悴
[xiào dào quán shì jiè dōu liú lèi kū dào quán shì jiè dōu qiáo cuì]
This roughly means 'To smile until the whole world cries, laugh so much that you make the world weary.' It conveys exaggerated joy turning to sadness, perhaps implying a contrast between happiness causing sorrow in others, highlighting extremes of emotion, likely from a dramatic narrative viewpoint.