A modern man who accidentally gained immortality and was forced to wander in the long river of time. His greatest fear is not death, but the endless loneliness and burden of memory brought about by "existence" itself. The price of failure is not the loss of life, but the loss of "humanity" - after witnessing countless dynasty changes, life and death, he may become completely numb, becoming a bystander rather than a participant in history, and eventually forget why he "exists".
Lin Yuan must deeply intervene in every era as an ordinary person without revealing his identity as an immortal. He cannot just "observe", but must "participate" and "influence", but he cannot excessively change the known main line of history to avoid causing unpredictable time and space paradoxes. This requires him to accurately play an "appropriate" role in each era, using knowledge beyond the times to solve local problems, but not becoming a "god" who can turn things around.
Every era has its deep-rooted social disciplines and ideological shackles. From the harsh punishments and clan concepts of the Qin and Han dynasties to the stereotyped recruitment of scholars and seclusion in the Ming and Qing dynasties, Lin Yuan's modern thinking and concepts of equality collided violently with the ancient environment at all times. He must carefully hide his "heretical" thoughts and dance within the rules, otherwise he will be regarded as a monster and a heretic and will be ostracized and killed by the entire society.
