C3869 Prepare for Foundation Building

Although this Foundation Treasure looks like a book, and... there seems to be words on the cover of this book... However... the words were rather vague and looked very strange. In any case... Lu Shan's eyes widened, but he could not recognize the words on it.

In addition... this book could not be flipped open at all. It could not even open the cover. It was just like a brick.

Actually