原来笑也可以这么牵强原来哭也可以那么悲伤
[yuán lái xiào yĕ kĕ yĭ zhè me qiān qiáng yuán lái kū yĕ kĕ yĭ nèi me bēi shāng]
This means ‘it turns out smiles can also seem forced, crying also can bring so much pain,’ highlighting the contrast of emotional expression - even joyous moments could appear false, and weeping may not relieve one's profound sorrow.