傻瓜我会爱你到老笨蛋我也会爱你到老
[shă guā wŏ huì ài nĭ dào lăo bèn dàn wŏ yĕ huì ài nĭ dào lăo]
Literally means 'Fool, I will love you until I grow old. Stupid, I will also love you until I grow old'. Despite using words with negative meanings traditionally ('fool'/'stupid'), these are being utilized here as terms of endearment. It’s an endearing promise showing unconditional love and support no matter what.