πI recommend the following two novels to you: 1. "Master Time and Space: Three small goals to make a fortune at the beginning": Jiang Hao sold worthless things from the present world to the future world through the future delivery platform, subverting the entire physics and technology world. The worthless things from the future world could be of great value in the present world. This sci-fi futuristic novel was exciting. 2. "Time and Space": Wang Kai used a severely damaged time and space machine that allowed him to travel between the modern city and the Northern Song Dynasty to become a time and space dealer who bought low and sold high. The style of this novel was different, but it was equally thought-provoking. I hope you like this fairy's recommendation. Muah ~π