C687 The Truth of History

When Su Wen asked about the two lines of words behind the door, Old Master Sunn explained.

"This is the ancient text of the Bone Text. As for the specific meaning, I will find out later. Old Master Sunn took out a book from the bookshelf that was a few years old. The cover of the book was already unreadable. After searching for a while, he closed the book and said slowly