Systematic Black Technology City

He inexplicably traveled through time and inexplicably became the little city lord of the border fortress of an alien empire. With the help of the golden finger that is necessary for time travellers, he gradually grew into a peerless power in this world, and the black technology city he owned would also become an independent kingdom on the continent. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.