I Transmigrated into a Powerful Eunuch

Lin Feng was a history graduate student who, after an accident, transmigrated into the body of the notorious eunuch Wei Zhongxian at the end of the Ming dynasty. With a start this disastrous, how will Lin Feng use his 21st-century knowledge and the support of a dual System to battle the Donglin faction, provide disaster relief, crush rebellions, defeat the Jurchens, slaughter the Sakura, and contend for the realm, ultimately leading the Ming dynasty back to an age of prosperity when all nations came to pay tribute?