When Xia Xuan woke up and found that he had become a slave sacrifice in the Xia Dynasty's sacrificial ceremony, he had only one thought - to survive.
Carrying a complete memory of modern science, he has witnessed and participated in shaping every turning point of Chinese civilization starting from the first dynasty and going through three thousand years of ups and downs.
He taught basic agriculture and astronomy in the Shang and Zhou dynasties, established a secret knowledge inheritance system in the Qin and Han dynasties, promoted the budding technological revolution in the Tang and Song dynasties, and made difficult choices in the face of Western impact in the Ming and Qing dynasties...
He is not an emperor, but he is the most special "observer" and "sower" in every era.
When history reached 1911 and the cannons of the Wuchang Uprising rang out, the gray-haired Xia Xuan finally completed his mission spanning four thousand years: to allow this civilization to face the advent of the modern world with a more calm attitude.
