今生今世非卿不娶今生今世非君不嫁
[jīn shēng jīn shì fēi qīng bù qŭ jīn shēng jīn shì fēi jūn bù jià]
This grand declaration signifies unwavering dedication: ‘In this life, I will not marry anyone but you.’ It conveys strong romantic feelings with ancient Chinese literary elegance.