C106 The Imperial Prison

Sighing, Xiao Yun began to patiently read books here for two days.

To be honest, some books could be read, but some books could not.

The knowledge system was like this.

One. One direction is to gradually deepen the knowledge, and the other direction is to correct the mistakes of the predecessors.

The difference in a few civilization alterations, in Xiao Yun's eyes