C1921 Relieving(part i)

This is?! Looking at the scene in the air, Lin Bai's expression changed, he felt that the pattern was extremely familiar.

River Diagram Book, this is the picture of the River Diagram Book! However, when compared to the River Diagram Book, this pattern was clearly slightly missing, and was not as complete as the River Diagram Book's. But even so, it was enough to make Lin Bai shocked