Lu Jun, a mechanical engineer, died suddenly while working overtime and woke up as Lu Chengjun, a boy who failed to succeed in school in Yunzhou County, Liang Dynasty. He burned a box full of eight-part essays, squatted on the river beach and pulled wood, and built a water-spun spinning wheel that could be worth fifty spinning women. A demonstration alarmed the Ministry of Industry, and a transfer order brought him into Xianning, the capital of the country, which was mired in floods and a dispute over relocating the capital.
Faced with the critical situation of diversion of rivers, empty treasury, and strife among the powerful, Lu Chengjun came up with a shocking plan: instead of moving the capital, he would build a dam on the wasteland outside the city to divert floods and divert water into canals, use water power to drive workshops, and use pre-sale financing of shops to build a "city that never sleeps" day and night. He cleared the silt ditches that had lasted for thirty years in three days, used Zhugan Lane to pilot "business to support industry", used the power of King Jian to break the situation, established an engineering team among the refugees, and gradually turned the ideal city on the drawings into a real scene.
However, the powerful people in the old city regarded him as a monster who ruined people's wealth, and the officials of Kedao impeached him for recklessly changing the ancestral system. The enemy secretly built a weir upstream, waiting for an opportunity to use water as a weapon to flood Xianning. Lu Chengjun must use gears, ditches, dams and financial means to build the strongest shield for the capital between the secret arrows in the court and the cavalry of neighboring countries. When the once-in-a-thousand-year flood peak roared down, the West Branch Canal designed by him quietly turned the Gate of Death towards the enemy camp. This is a story about wisdom, courage and vision, and a story that rekindles the soul of modern engineering in ancient mountains and rivers.
