I see. So it would keep his life force from being consumed by unnatural methods.

Yes, that does help my understanding. As for making sure he is well connected, I assume you will attempt to visit in some capacity since you also have a fairly long lifespan. I shall also keep him company. He could take comfort in the fact that being together would probably slow down both of our erosions.

That provides him with a solid foundation, and he can start looking for other connections from there, both here and in Teyvat.