Great Tang's Mightiest Crown Prince

He accidentally transmigrates into the body of Li Chengqian, a crippled commoner. All his servants have fled, and he never knows where his next meal is coming from. But could that defeat Li Mu? Not a chance. He has an all-purpose System, with mastery of both the civil and military arts. He opens a clinic, builds a dye works, develops an eightfold-yield crop industry, and establishes an unbeatable livestock business. He vows to try every trade available in the System. Go back and become crown prince? Not a chance. He swears brotherhood with Sun Simiao, takes Yuchi Gong on as a lackey, drinks fine wine, and lives in a luxurious mansion. Li Er asks to see him? He says he’s busy. Empress Changsun comes by for a drink? He tells her to pay up. The princess has her eye on his cloth? That can be negotiated. Who says you have to be emperor to be happy? Isn’t enjoying life the best?