把你名字写我户口本上把我名字写你户口本上
[bă nĭ míng zì xiĕ wŏ hù kŏu bĕn shàng bă wŏ míng zì xiĕ nĭ hù kŏu bĕn shàng]
'Write Your Name in My Household Register and Mine in Yours.' This refers to getting married, which involves legally uniting two families in China. In essence, it expresses a commitment akin to marriage.