若不离此生不弃若相离此生永记
[ruò bù lí cĭ shēng bù qì ruò xiāng lí cĭ shēng yŏng jì]
A romantic declaration translating into 'If we don't part, I will never abandon you in this life; if we do part, you shall always be remembered'. It emphasizes deep, everlasting commitment and unyielding love despite distance or time.