In 2357 AD, physicist Qin Guan accidentally fell into the turbulence of time and space during an illegal time experiment and was accurately thrown to 221 BC - the day when Qin Shihuang unified the six countries. To make matters worse, the quantum communicator he carried was treated as a "monster" and presented to Ying Zheng.
Ying Zheng was obsessed with this "sky box" that could transmit sounds thousands of miles and calculate celestial phenomena. Qin Guan lied that he was an alchemist and used future knowledge to solve engineering and military problems for the Qin Dynasty, and gradually became Ying Zheng's most trusted "Tiangong Order". He tried to secretly revise history - persuading Ying Zheng to "burn books rather than collect them" and digitally preserve hundreds of classics; he improved chidao and bronze crafts so that the people would lessen the pain of harsh rule.
But the Time Administration agent from 2357 quickly traveled through time to erase the fluctuations in the timeline caused by him. Qin Guan must make a choice between returning to modernity and staying in ancient times. Before Ying Zheng died, he told the truth about the world a thousand years later. The First Emperor who wanted immortality laughed and gave up the elixir, giving him the final task of rewriting the direction of Chinese civilization...
——When time becomes a weapon, one person's choice can subvert a thousand years.
