In the year 4736 of the Chinese calendar, China was deeply trapped in Western technological blockade and cultural penetration, and its civilization was in danger.
The only chance to break the situation was hidden in Great Qin two thousand years ago!
Qin Yu was given seven days to prepare, memorized physical and chemical classics, a complete set of blueprints for steam engines and gunpowder, and traveled back to the Qin Dynasty in one direction with high-yielding grains and healing and detoxifying recipes.
When meeting the First Emperor, he did not pretend to be a ghost, but simply exposed himself. Lay out the map of the world for later generations and lament the five chaos of China and the centuries of humiliation in modern times.
Ying Zheng was furious and smashed the dragon case, and vowed to protect China forever. He respected Qin Yu as the national master and revolutionized the whole country: he stopped repairing the Lishan Mausoleum and sent millions of prisoners to make steel and mine coal; he gave up the prescription of immortality and devoted all his efforts to forging firearms and building steam ironclads.
The space-time butterfly effect sweeps across the world. Western experts are still bragging about technological monopoly, but the archaeological team has unearthed the Qin steam engine from the Mausoleum of the First Emperor; overseas history books have been rewritten to record a Qin army of gunfire and iron that swept across Europe and Asia.
One person travels through ancient times, one emperor reverses the course of a thousand years, and the First Emperor spans two thousand years to carve out a way for future generations of China to survive.