In 2126, the time-space retrieval project led by the all-round genius Lin Yan accidentally got out of control and was involved in turbulence. From then on, he embarked on the road of redemption that traced back to the last years of Chinese history - no system, no golden fingers, only a full body of modern knowledge and a compassionate heart.
In the war of the late Qin Dynasty, he improved iron smelting and relieved the harsh government as a refugee. In the troubled times when Zhao Gao was in power and Chen Sheng acted righteously, he left technological fire for the Qin Dynasty that was about to collapse; in the duckweed period of the late Han Dynasty, he used his medical skills to contain the Jian'an plague and relied on his iron smelting skills to help Cao Wei recuperate, but he stuck to his heart amidst Cao Cao's talent and ambition; in the storm of the late Sui Dynasty, he improved the canal engineering Art, rectification of military discipline in Wagang, trying to fight for a glimmer of life for the people amidst the separatist rule; in front of Yashan Mountain in the late Song Dynasty, he upgraded firearms, strengthened city defenses, extended the glory of the Xiangyang Defense War, and witnessed the broken mountains and rivers but not abandoning the fire of civilization; when the sky collapsed in the late Ming Dynasty, he predicted natural disasters, prevented and controlled plague, and tried his best to delay the catastrophe of troubled times in the desperate situation of Chongzhen's suspicion and party strife and chaos.
He is not a savior who defies fate and changes his fate. He does not forcibly overturn the historical trend. He only uses modern knowledge to "reducing dimensions and adapting" to ancient productivity, alleviating the casualties of war, and retaining the glimmer of technology and systems. He has no ties and no involvement in love, only loneliness and perseverance. In troubled times, side by side with historical figures such as Li Si, Guo Jia, and Wen Tianxiang, in the pull of hard work and powerlessness, he finds the anchor point to return to the future, and also leaves an echo for human civilization that spans thousands of years.
Strictly adheres to history, rejects mindless golden fingers, and looks at future geniuses using knowledge to overcome troubled times and using rationality to achieve redemption. Every step of intervention has traces to follow, and every persistence is moving.