我想为你打一辈子领结我想为你系一辈子鞋带
[wŏ xiăng wéi nĭ dă yī bèi zi lĭng jié wŏ xiăng wéi nĭ xì yī bèi zi xié dài]
This expresses deep affection and commitment towards someone. 'I want to tie your bow ties and your shoelaces for the rest of my life' conveys the idea of wanting to take care of every aspect of someone's life, showing undying love and devotion.