A Tang Dynasty Merchant's Convenient Son-in-Law

Modern young man Du Peng accidentally transmigrates into the body of Du He, the only son of the renowned Tang chancellor Du Ruhui. After using modern CPR to save Princess Changle, Li Lizhi, from drowning, he somehow ends up as the son-in-law of Emperor Taizong of Tang, Li Shimin. As an idle prince consort, Du Peng draws on his knowledge of the future to refine salt, brew fine liquor, start a newspaper, develop firearms, and open up maritime trade. With one invention after another, he helps the Tang Dynasty repel foreign enemies and revitalize its economy, turning it into a superpower whose influence spans Asia, Africa, and Europe.