In Time Travel, I Am the Prime Minister of the Empire

Lin Fan, a grassroots civil servant + infrastructure mad soul in the 21st century, accidentally traveled back in time to the Qingli period of Song Renzong, and became the new prime minister in place of a young official who died of illness. Facing an empire that was rich in culture but "poor and weak", he held the "Tucao Energy System" that came with time travel in his left hand, and brandished modern engineering and management knowledge in his right hand, determined to use reinforced concrete and economic principles to inject a simple and crude vitality into this elegant but aggrieved dynasty.