待我弦断音垮许你青丝白发
[dài wŏ xián duàn yīn kuă xŭ nĭ qīng sī bái fā]
A very romantic sentiment, translated roughly into 'when my string of fate breaks down and my beautiful tone collapses I promise you white hair despite it was once dark'. It symbolizes an eternal commitment until death separates the lover, showing a deep longing for an unbreakable bond with another person.