陪你青丝到白发陪你孤单到相依
[péi nĭ qīng sī dào bái fā péi nĭ gū dān dào xiāng yī]
To stay by your side from black hair until white, from loneliness to interdependence. This symbolizes unwavering companionship and dedication, emphasizing deep love that lasts through every stage of life.