Longevity Begins with Longevity

Yan Xuan traveled through time, became a short-lived ghost, and owed a large amount of rent. He felt that he was dead this time. Later, I discovered that there was a panel in my mind. As long as I did business [high], bought [low], and sold [low], I could get longevity yuan! It's a pity that with such meager financial resources, I can't lose much at all. Just when he fell into despair, his beautiful cousin learned of his predicament of rent arrears and resolutely came to help with his marriage... And his spiritual stones. He got longevity as he wished, and thought he could achieve eternal life in this special way... Until one day, the visit of a man in black robe broke all this and plunged him into a cruel battle for longevity.