Long Yan just smiled at his friend, seemingly aware of Jian Wuchen's reaction all along. Of course, Long Yan wasn't teasing Jian Wuchen.
The saying goes that there are no absolutes, and what appears to be a dead end often has its solutions. Indeed, Long Yan had created countless miracles in such situations, and the situation with the Charm Bone was no exception to this logic.
While historically, no one has been able to heal someone born with the Charm Bone, and it's rare for such people's lives to be extended, Long Yan actually once read of an idea in an ancient book collected by the Yanmen Commerce Association.