C1450 Fantasy Flower Valley

"'Ancient Eight Trigrams Annotation' by Wang Tian Yang?"

Li Yun was stunned as he looked at the book that Wang Mengyan had given him. This book was very old, and although it was well maintained, the years had left a deep mark on the book.

He opened it and saw that it was filled with the research of the eight trigrams diagram. The handwriting was also small, and there were no punctuation marks