你心我拿520粘好
[nĭ xīn wŏ ná 520 zhān hăo]
'I'll use 520 to stick your heart back together' - here, 520 stands for 'I love you'. The person is saying that they're ready to help repair any broken pieces in another’s life using their love as bonding agent; a creative way to say they will offer support and care.