Bloody Ribs

Time travel, fantasy, supernatural, decryption, interlocking, the more you read, the more exciting it becomes. It is a novel worth reading twice. An ordinary high school student accidentally learns his true identity, and his old enemy has become his "tutor". His grades are reversed and his life is reversed. He uses the power of mathematics to create new rules, fight against the Yin Emperor, break the boundaries, and reset the rules of the world. Is he a book wearer? Is it a container? A mortal? Is it the Ghost King? A mind-expanding classic fantasy novel