Great Ming Son-in-Law: From the Start, I Help Zhu Di Become Emperor

Modern man Gu Wang transmigrates to the early Ming dynasty, where he is imprisoned and becomes an escaped slave. At a critical moment, he binds himself to a mysterious System. His first mission is to approach Zhu Di, the Prince of Yan. Using the System and his quick wits, Gu Wang catches the attention of Zhu Di, who is traveling incognito, during a street brawl. Impressed by his clean background and unusual manner, Zhu Di selects him as a potential son-in-law, and Gu Wang unexpectedly enters the Prince of Yan's household. A lowly live-in son-in-law, he navigates the currents within the prince's residence and threats from the outside world, quietly building up his strength with knowledge from beyond his era and help from the System. He improves farming tools and offers strategies, forging a subtle bond with Zhu Di's three sons and winning the heart of a commandery princess. When the Jingnan Campaign begins, Gu Wang becomes one of Zhu Di's hidden cards, repeatedly earning great merit with brilliant schemes and technology from the future. After Zhu Di ascends the throne, Gu Wang champions voyages abroad. Together with Zheng He, he makes seven expeditions across the Western Seas, spreading the nation's prestige, expanding its maritime borders, and leading the Ming dynasty toward global hegemony. This is the rousing legend of a nobody who, as a live-in son-in-law, stirs up history from behind the scenes and ultimately helps the Ming dynasty conquer the world.