This part of history had long been reduced to myths and legends in many battles!
Lu Xuan had also inadvertently learned about it in his previous life. In this life, almost no one on Earth knew about this part of the past.
Ordinary people did not even know about the decline of the earth's cultivation world, which once had a glorious cultivating civilization.
Right now, Lu Xuan's family could've been regarded as a family at the top of the entire cultivation circle. In theory, there was nothing that they didn't already know about the cultivation world.
Lu Xuan had gotten people to photocopy the books of various sects a long time ago. Of course, they did not involve specific secret books of cultivation. It was only some hand letters from the ancestors, which had covered things of different aspects. Although they did not have the core secrets of the sects, they were still considered to be extremely precious.