Albus was the headmaster of Hogwarts in this world, as well as an old-established Archwizard.
Hogwarts had the right to recommend outstanding graduates for further study at First University. It was one of the privileges of that ancient magic school, and had been maintained for several centuries.
"—This privilege was an important pillar supporting Hogwarts' status as Europe's number one secondary school, while Hogwarts' status as Europe's number one secondary school was itself at the heart of every story in Ms. J's autobiographical novel. In other words, if someone wanted to replicate the concept of 'Hogwarts' somewhere beyond our world, they would inevitably become tainted by that concept."
Old Man Ruo Yu spoke at a slow pace.
Yellow Flower Cat listened in a daze, then turned to glance at Zheng Qing.
"—What is this old man talking about? It sounds hard to understand... No wonder he couldn't become a headmaster. Not even Legends can understand the way he talks, much less those young students."
Its complaint was perfectly reasonable.
Because even Zheng Qing found Old Man Ruo Yu's conjecture somewhat difficult to grasp.
"—After Dean Zheng issued the warning to the school, I immediately reviewed many clues along the Timeline. Among them was an admission letter belonging to a young member of the Tukiji Cult... That admission letter was the embodiment of the 'concept that would inevitably become tainted' which I mentioned earlier."
Old Man Ruo Yu became more specific. "Because of that letter, I have reason to believe that a certain Great Being, in some dimension not belonging to our world, created a world similar to ours based on Ms. J's book... But that world had no First University, only Hogwarts. Albus, the headmaster of Hogwarts, was still the headmaster of Hogwarts in that world."
"Something like a projection?"