I’ll Govern This Realm for My Brother-in-Law and Nephew

Since my brother-in-law doesn't want to rule the empire, I'll take care of it for him and my nephew!!! Through a twist of fate, Zheng Guotai arrived in the eighteenth year of the Wanli reign of the Great Ming and became the brother of Zheng Guifei. His sister had long dreamed of becoming empress, while his brother-in-law, the emperor, wanted to retire from the world. Above him, court officials were constantly looking for a chance to put him in his place; below him, hereditary nobles looked down on the emperor's in-laws. And then there were the Manchu barbarians who would invade decades later! At this point, Zheng Guotai just wanted to flip the table. My brother-in-law is the emperor. As long as I don't rebel, who can touch me? If you want to mess with me, ask my sister if she agrees first!! Dressed in a flying fish robe and wearing an embroidered spring knife at his waist, Zheng Guotai rampaged across the Great Ming with countless imperial agents at his side! Mines? Our Imperial Guards are short on weapons. Mind handing them over? Farmland? Our Imperial Guards are short on food. Mind handing some over? Maritime trade? Our Imperial Guards are short on gold and silver. Mind handing them over? What? You refuse? Do you know what battleships and cannons are? Do you know what armored tanks are? How about I take them over to your house for a little visit!