The turmoil at the end of the Tang Dynasty brought about the Five Dynasties and Ten Kingdoms. This was the darkest and most terrifying era in Chinese history. In some barren places of that era, cannibalism was no longer unusual. Especially in the later Jin Dynasty in the middle of the Five Dynasties, its leader Shi Jingtang, in order to protect the throne, did not hesitate to proclaim himself a vassal to the Khitan Emperor Yelu Deguang, who was ten years younger than him. He also ceded the Yanyun Sixteenth Prefecture in the northern part of the Central Plains, making the Central Plains like fish and meat, and was in danger...