[Time-travel critical attack + two male protagonists burning souls] Li Yun, a history graduate student, fell off a cliff and woke up with his face on a pile of corpses. The bronze medal in his hand was engraved with "Geng Jing Rebels - 1161".
He traveled through time when Xin Qiji was twenty-two years old. In the bloody fire of the Jin soldiers massacre, Li Yun used the last half of a compressed biscuit to save a child. The other party handed over the blood-stained family bronze seal: "Tell General Xin that the three hundred people in Zhangjiazhuang will all be Song people until they die."
In front of him is the most aggrieved hero in history - young Xin Qiji is leading fifty cavalry towards the hundred-man Golden Army, just to save fifty strangers. Li Yun stopped his horse and blurted out: "You will write words that will shine through the ages in this life, but you will also bear the regrets that will shine through the ages."
Xin Qiji put his sword against his throat: "Are you Jin Renxizuo?"
"No, I come from eight hundred years in the future." Li Yun took out the "Chronological Notes on Jiaxuan Ci" and turned to a page with a secret letter. "I know that Monk Yi Duan stole the seal and defected tonight, I know that Zhang Anguo will kill his master and surrender to the enemy half a year later, and I also know that after you founded the Flying Tiger Army, you will be dismissed from office and live idle for twenty years -"
"But if you believe me, we will not only kill the gold thieves, but also kill this era of cannibalism."
Since then, the fate of the two male protagonists has been decidedly bound:
Li Yun used calculus to improve the trebuchet, used psychological profiling to uncover the traitor, and even used modern medicine to extend Xin Qiji's life for five years;
Xin Qiji taught him the rules of survival in troubled times, and confessed during countless chess games late at night: "I originally thought killing thieves was an obsession, but when I met you, I realized that it was salvation."
When Xin Qiji was dismissed from office and trapped in Daihu in his middle age, Li Yun secretly established the "Qingshan Academy" to inject modern management into ancient military politics;
