牽著妳的手壹起到盡頭握住我的手壹起到白頭
[qiān zhù năi de shŏu yī qĭ dào jìn tóu wò zhù wŏ de shŏu yī qĭ dào bái tóu]
Translating closely, this means ‘Holding your hand together till the end; hold my hand all the way till we turn white’. It’s a profound promise of undying commitment, love, and companionship through life's journey until old age, akin to a wedding vow emphasizing eternal unity.