Back in Time: I Have a Star Rail Random Door

(A less traditional Star Iron fanfic) [Star Railway] + [All Heavens and Worlds] + [Any Door] + [No Female Protagonist] (The main focus is on Star Iron) What do you say when you trade high-energy battery blueprints from a clerk at the beginning? What do you mean if any door comes with a built-in plug-in? Su Hao went back to the past without knowing it, and returned to the beginning of his college life. Not only that, he was also bound to a magical arbitrary door system... A life of cheating needs no explanation. Although there is currently only one connected world, the potential of this world is extremely huge... Technology far ahead of the times, the mysterious Star God, friendship across the world... All this fascinated Su Hao. However, in life, we never know which will come first, tomorrow or the accident... The reality is not as beautiful as the game makes it look... The death of his friend gave Su Hao a firmer belief? Or an unknown curse? Su Hao didn't know either. The only thing he can do is try his best to do everything he can... He is just a star god who is on the wrong path! Star God? But little. If I destroy you, what does it have to do with you! (Sword kills Nanook!) (What you wrote before is a bit bland. Please be patient and read about chapter 30, which is the climax of the plot~)