Yu Shan traveled through time and became a refugee in the Tang Dynasty, and was regarded as the source of the plague at the beginning.
He relied on modern epidemic prevention knowledge to save the entire village, but was regarded as a monster by the county magistrate and jailed.
In prison, he happened to meet the prince in trouble, and used statistics to predict the locust plague, helping the prince regain the favor of the Holy Family.
When the plague broke out in Chang'an, he drew a map of the quarantine area and used alcohol disinfection to shock the Imperial Medical Office.
When An Lushan's rebels approached the city, Yu Shan offered the gunpowder formula to turn the tide of the battle.
The empress Wu Zetian secretly wooed him, and the prime minister Li Linfu set up a deadlock.
Yu Shan chuckled in the court: "What I want is not to have power over the world."
He unfolded the world map: "Your Majesty, the real battlefield is in the sea of stars."
