Como é que eu me tornei o supremo?

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[I am you from the future.]
Xu Mingsong sat at his desk, staring dumbfounded at the glowing text that suddenly appeared in his field of vision. He picked up the well-worn copy of "The Three-Body Problem," which Old Xu had nearly worn to pieces. What the hell? Is this sophon coming to visit him?
Suddenly, panic surged through him.
It wasn’t entirely Xu Mingsong’s fault. A torrential red rainstorm had shut down all primary and secondary schools in Winter City. But as a disciplined Sigma male, even though high school classes were canceled, he still held late-night self-study sessions at home.
One moment he was furiously working through his tricky little problems until he nearly lost his mind; the next, he looked up and found a cluster of floating text following his gaze wherever he turned. Anyone would freak out in such a situation.
If you want to find someone, go find the Wall-Facer, why come to me, a high schooler?
[Focus. I really am you from the future.]
The letters in his vision blurred and transformed into a downward arrow [↓]. Xu Mingsong followed the arrow to the center of his wooden desk, where a "Five Years of College Entrance Exam, Three Years of Simulation" workbook lay. Nearby was a pile of books topped with a few math exam papers, on which a stack of Yu-Gi-Oh! cards rested. Under the light, the Ankh cross pattern gleamed brightly.
This was the talisman he had taken from Old Xu after hearing about the pre-"catastrophe" entertainment culture—a charm to prevent him from dying su