我的心此生不变我的爱此生不悔
[wŏ de xīn cĭ shēng bù biàn wŏ de ài cĭ shēng bù huĭ]
It translates to 'My heart will never change for this lifetime; My love will not regret in this lifetime'. Expressing the steadfastness and unwavering commitment in one's feelings of love. Despite trials and tribulations throughout life, these emotions remain unchanged.