Build a Magical Kingdom of Science and Technology

Me: I promised that after completing the task, I would reach the pinnacle of my life. Why would you send me to another world? Isn't he the pinnacle of human life in this world? System: It's not a big problem. As long as a person has the ability to reach the top, he will be at the top wherever he goes! Me: Then what do they mean? Why do they all look so powerful? System: It's not a big problem. These ex-girlfriends of yours only traveled 500 years before you. Me: Gan! Then it has to be given some special abilities, right? Otherwise, how can we get along? System: It's not a big problem. All the points have been used to redeem the most useful things in the world for the host. Me: Earth Library? All knowledge of the earth? Does this thing have any use in the world of Xianxia? I don't want to play anymore, let's send you back to earth! System: Congratulations to the host for getting a new mission and providing technology to the world of Xianxia!