"推背圖" is an ancient Chinese prophecy book consisting of sixty diagrams. Legend has it that it was co-authored by Li Chunfeng and Yuan Tiangang from the era of Emperor Taizong of the Tang Dynasty. It predicts the rise and fall of China's fortune over two thousand years after the Tang Dynasty. The predictions in "推背圖" have been eerily accurate, with historical events unfolding in accordance with its illustrations. Despite being considered a forbidden book by rulers in ancient times, it was revered by common folk as a classic. Handwritten copies of the book circulated widely, carrying people's hopes for understanding the future and foreseeing all things.