Traveler World: I Am a System Repairman

"Professor Su, there is something wrong with my sign-in system." "Professor Su, what should I do if I can't get rewards for my immortality cultivation system?" "Professor Su, something bad has happened. My beast control system is down..." Su Li: "Pan Mao, come one by one. No matter how big the problem is, I'll fix it for you in an hour." Su Li, a Muggle who barely graduated from a third-rate university, traveled through time to a world full of time-travelers. He did not travel through the system, but he had the memory of system repair knowledge. In such a world of time travellers, Su Li is a god-like existence. A college student who failed every year became Professor Su. In view of the differences between various systems, some systems have their own darkening properties, and a large number of dark and evil time travelers have formed a group to obtain system rewards, and they are lawless, but... "Professor Su, the system is garbled..." Su Li: "I heard that you just blew up a financial center? Sorry, come back to me in fifty years." Su Li upholds justice and spares no effort to balance the black and white forces in the world... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.