你不是真正的快乐你的笑只是保护色
[nĭ bù shì zhēn zhèng de kuài lè nĭ de xiào zhĭ shì băo hù sè]
You Aren’t Truly Happy; Your Smile Is Just a Defense Mechanism. This reflects feelings of inner sadness or pretense of happiness, masking true emotions or pain behind a smile.