笑多了也会哭撑久了也会累
[xiào duō le yĕ huì kū chēng jiŭ le yĕ huì lĕi]
Roughly translating into 'laughing too much will lead to crying eventually, staying strong for too long can also result in exhaustion,' the user conveys an understanding that even the most joyful or resilient experiences cannot last forever and have their limits.