彩虹再美也比不敌不过你的
[căi hóng zài mĕi yĕ bĭ bù dí bù guò nĭ de]
Means 'No matter how beautiful the rainbow is, it can’t compare with you'. Expressing deep admiration and affection for someone considered exceptionally charming or significant beyond any comparison with natural beauty, here a rainbow is mentioned for its striking visual effect.