The Marquis's Mansion Son-in-Law: Using Modern Knowledge to Crush the Competition

Transmigration + son-in-law + no System + business warfare + war

Modern man Lin Fan transmigrates into the past as the lowest-ranking son-in-law in a marquis's household. All he wants is to lie flat.

But when he sees his stunningly beautiful wife getting riled up every day by all sorts of unscrupulous merchants, he reluctantly brings out his modern marketing genius.

“Ladies, how about signing up for a supermarket membership card to earn points?”

“Young master, you can save five hundred coins with a group-buy discount. Could you help me out?”

“Your Majesty, I suggest issuing ‘Great Xia State Bonds.’ The interest will definitely beat what you get borrowing from corrupt officials!”

Then one day, an enemy nation comes knocking. Lin Fan silently pulls out a homemade bomb. “Um... interested in getting into the arms business?”