你若敢嫁我必敢娶你若敢死我必敢埋
[nĭ ruò găn jià wŏ bì găn qŭ nĭ ruò găn sĭ wŏ bì găn mái]
'If you dare marry, I'll surely marry you; if you dare die, I will surely bury you'. A vow showing commitment through all stages and trials of life or expressing undying loyalty under drastic circumstances, including afterlife.