There are not many people who can see through the peak level six formation carved on the ring at a glance, but that doesn't mean there aren't any. When Ning Cheng met Rui Baishan for the first time, his concealment ring was spotted by Rui Baishan. It was precisely because of his ring that Rui Baishan knew that Ning Cheng was a master of formations, but Rui Baishan didn't say it....