那些泪不是敷衍那些笑只是掩饰
[nèi xiē lèi bù shì fū yăn nèi xiē xiào zhĭ shì yăn shì]
This implies that the tears one sheds are sincere (not fake or insincere), while smiles serve as a cover-up. Perhaps they are used to hide inner sadness, suggesting a sense of emotional complexity in life.