The Handsome Son-in-Law of the Countryside

As a live-in son-in-law from the countryside, Li Qi only wanted to enjoy a comfortable life being supported by his wife. But by a stroke of fate, he acquired an ancient legacy, and from then on mastered everything from astronomy and geography to medicine, martial arts, and the eight trigrams... Now he can’t even keep a low profile. How is he supposed to keep living off his wife?