"You been here longer than I have after all of this time? This world is different you know." But then he may figured out it's definitely a very futuristic world, with his eyes healed and he could see and he sees Xue Yang the way he is now, but what he will become, the future is uncertain and undetermined.

"Mm. Take care, Xue Yang." It's a brief meeting, but who knows how long the world allows him to stay. For now, it's a meeting that can last a lifetime.

"Until we meet again." He said, almost like a promise.