笑着笑着就痛了
[xiào zhe xiào zhe jiù tòng le]
'Xiao Zhe Xiao Zhu Tong Le' translates as 'Smiling until it hurts.' It expresses the feeling of having to put on a happy face even when feeling pain or sadness inside, which can happen when facing difficult situations that require maintaining composure or supporting others despite personal struggles. It reflects the bittersweet duality of laughter and tears in life.