Congratulations on being the literal first person to question his healing methods, Jingyi, and also could this not have waited for two minutes?

But he's asked, and Ryo isn't going to leave him in the dark if he wants to know. "My magic connects my life to yours, and that's what I use to heal you; it doesn't hurt me; your wounds healing faster than they normally would is what hurts; and if you break the connection before I sever it, it could kill us both." He gives that last one a moment to settle, not breaking eye contact with Jingyi. There's a reason he warns people up front. "So. When you're ready."