After he dries up and puts on his robe. "Do you know how to use empathy? Not your technique. The device." Since the device is the only way to send messages. While he knows what Wei Ying is capable of, seeing this one use his powers had him curious, but he didn't want him to overexert himself

Perhaps no explanation necessary. It was a strange connection, but friendship is all he could ever ask for.

"Let's meet again."