The Bigger the Courtyard Gets, the More Obedient the Crown Prince Becomes

After transmigrating to the Ming Dynasty, Du Ruhai becomes a sickly young man with a heart condition who has just been dumped by his fiancée. By chance, he awakens the [Infrastructure System]. From the start, he renovates a shabby little courtyard, only to have the Crown Prince show up and ask him to be his teacher! Du Ruhai lays a stone road, and the System rewards him with an imperial-exam question bank. Du Ruhai digs a swimming pool, and the System rewards him with a lost military manual! So while everyone else takes the exams, Du Ruhai makes cement; while others fight for power, he launches a courier service. While others close the seas, Du Ruhai teaches the Crown Prince to fight Japanese pirates. While others embezzle, he teaches the Crown Prince to reform the salt administration. Before long, his humble courtyard has become a cradle of Ming technology! Zhu Houzhao: “Master, should we build a railway or an aircraft carrier next?” Du Ruhai: “Don’t rush me. Let me put a hot spring in the back garden first.”