The master of kendo theory, the teacher of the five great sword sages, the first person in the glorious era... Yi Chen, who has many names, died of a congenital internal organ defect at the age of 48. Three thousand years later, the mainland kendo has entered the lowest point in history , Shu Zi became the king. After rebirth, he became a dandy young master. He transformed into a peerless genius, executed killings, controlled the world, and made waves again. This...is a story of the rebirth of a theoretical master.