Lu Han, a 29-year-old doctor of engineering, regretted that "he wanted to be a sailor since he was a child but was forced to become a top student by his family". During the experimental explosion, he traveled to Taicang Liujiagang in the third year of Yongle (1405) - the starting point of Zheng He's first voyage to the West. When he was dying, he used modern meteorological knowledge to predict heavy rains and used mechanical principles to repair the damaged compass. He was spotted by Zheng He and became a fleet staff officer.
From then on, Lu Han followed Zheng He on seven voyages to the West, using "chemical formulas to tame the poisonous arrows of cannibals", "locating disappearing islands with geographical longitude and latitude", using "microbial knowledge to break the curse of witchcraft", and using "engineering to build offshore supply stations". From "a nerd who can only talk on paper" to "the anchor of the fleet". When Zheng He completed his mission and prepared to return to Beijing to be granted a title, Lu Han chose to lead a group of "marginal people who did not want to be bound by the imperial power" - sailors with pirate backgrounds, female doctors expelled from the tribe, Jianwen's old tribe who lived overseas, and alien princesses who admired him - to take root in the unknown continent and use modern infrastructure thinking to build a new kingdom that was "inclusive, open, and technologically advanced", realizing the ultimate dream of "spending a lifetime as a sailor."
Doctors in modern engineering use "scientific golden fingers" to reduce dimensionality to combat the crisis of ancient navigation. From "social animals forced to involute" to "the king of the sea who conquers the unknown", they turn textbook knowledge into a life-saving artifact and turn adventure dreams into a real kingdom.
