你若不离不弃我便生死相随
[nĭ ruò bù lí bù qì wŏ biàn shēng sĭ xiāng suí]
Promising unconditional companionship; 'if you neither abandon me nor distance yourself from me I'll remain devoted through every hardship'. It represents deep attachment, unwavering support in all circumstances between people deeply bonded with each other.