There were many things that couldn't be truly understood by merely reading a book; instead, they had to be figured out by each individual. The teachings of the Xuan Men were this sort of knowledge.
Han Sen planned to find a few people that could research the Xuan Men information on his behalf and determine what content might be suitable for humans to learn. He also wanted to establish a special school in the Alliance that would teach the Xuan Men techniques to other humans. He wanted to pass on the knowledge and expand the lineage of the Xuan Men.
It was just as Mister White had said: if one or two people in every ten million were able to follow the righteous path of Xuan Men, then that would be enough.
Surprisingly, Ji Yanran expressed an interest in the subject. Han Sen quickly turned the project over to her.