姑娘别把自己太当回事少年别把姑娘不当回事
[gū niáng bié bă zì jĭ tài dāng huí shì shăo nián bié bă gū niáng bù dāng huí shì]
Meaning 'A girl should not take herself too seriously, and a boy should not disregard a girl', this emphasizes a balanced view of respect in relationships. Both sides are advised against arrogance and carelessness.