As soon as Li Yan, a modern infrastructure madman, opened his eyes, he traveled through time and became a demoted county magistrate in the Liang Dynasty. Faced with the desperate situation of starving people, rivers bursting their banks, and official corruption, he gritted his teeth and started the "infrastructure system" - building canals, making cement, building fire pits, running schools, and even using chemical fertilizers to triple the yield per mu of wasteland! The people went from calling him a "monster" to kneeling down and calling him "Qingtian", which even alarmed the dignitaries of the imperial city. When the emperor sent people to investigate the "witchcraft", Li Yan opened the cellar with a smile: rows of steam engine models were humming... In this prosperous age, he would build it up from the mud with his own hands!