爱你到天荒地老疼你到地老天荒
[ài nĭ dào tiān huāng dì lăo téng nĭ dào dì lăo tiān huāng]
'Love you until the end of time and nurture you forever.' It is an expression of undying love and care, where one promises to love and support another person unconditionally for all eternity.