Strictly speaking, since First High and the Experimental School are rivals, and within the same grade, both possessing blue Spirit Beasts and being cultivated by their schools in similar circumstances, it's highly likely that they will fight all the way through to senior year.
It's quite natural to memorize the details of a future "formidable enemy" in advance.
After all, aside from his early "direct admission" status for the exchange competition, both his looks and the presence of Vishdair make him particularly eye-catching. There are even occasional anonymous uploads of candid photos of Lin Guang on the school forum—though he doesn't have much time to browse the forum, Wang Dawei is the one who keeps mentioning it.
"Haha! Before coming here, I thought, since it's not far from the Experimental School, maybe I'd encounter some interesting opponents. I didn't expect I'd actually hit the jackpot."
