Rui had spent the past few days going through all of the information that the Martial Union had gathered regarding the Shionel Dungeon. Thankfully, the Martial Union had organized and presented in a way that was quite user-friendly. Martial Artists were not known to be the brightest tool in the box, and intelligence management and processing was not their strongest point.
Thus, the Martial Union first provided an extremely broad outline of all of the information present that was simple enough for even a child to understand. The complexity slowly increased only if the Martial Union then further studied any particular aspect of the information provided.
Of course, this was an unnecessary measure for Rui, but it did make things easier. He needed time to process all that information once he stored all of it in his Mind Palace. After all, memorizing it did not necessarily mean storing it.