今生只做他的妻今生只做她的夫
[jīn shēng zhĭ zuò tā de qī jīn shēng zhĭ zuò tā de fū]
The phrase translates as 'In this life, I will only be his wife; In this life, I will only be her husband'. This shows unwavering devotion or dedication to a single partner or the importance of marriage or fidelity, transcending gender norms and emphasizing a mutual exclusive relationship dynamic.