Falling into Zhenguan with the Starship Battleship Database

The interstellar battleship "Great Wall" crashed into Chang'an, and the genius captain Liu Xin was seriously injured and lost his memory. After landing on the outskirts of Chang'an, he used the vision and technology at the crash site to directly shock Li Shimin who came over. He was hired into the palace as a 'wonder from heaven', and by chance, the sleeping database in his brain was instantly activated through lightning. Holding all the technologies of the second-level human civilization, he can command the remaining nano-robots to enlighten the stubborn iron, from plows to steam engines, from gunpowder to space carriers. Use technology to reshape the prosperous Tang Dynasty, just to repair the warships and lead the Tang army back to the star sea.