I recommend 'The Time Machine Is Out, And You're Still Making Trash?' The main character of this novel, Mu Yu, could also transmigrate to a parallel world. He had a black technology system and could easily exchange for all kinds of high-tech products. Moreover, he often went to the real world to purchase old and useless items, dismantling them and using them to exchange for system points. If you like novels where the main character can create technological items and exchange them for system points, then this book will be very suitable for you. I hope you like my recommendation.😗