陪你到至死不渝陪你到无坚不摧
[péi nĭ dào zhì sĭ bù yú péi nĭ dào wú jiān bù cuī]
This translates to 'Accompanying you until undying love; accompanying you to invincibility'. It portrays an intense loyalty and commitment in a relationship - a promise to stay no matter what, highlighting strength and unwavering affection that can even overcome difficulties.