Being at Hogwarts, something's not right with this system.

Lin Yu transmigrated. The good news was he got a system; the bad news was that the system seemed to be malfunctioning. When Lin Yu received his Hogwarts School of Witchcraft and Wizardry acceptance letter, the system insisted it was Nalan Yanran's annulment letter. And when Lin Yu encountered the three little wizards at the train station, the system pointed at Harry Potter and said he was Xiao Yan, demanding Lin Yu recite the classic line "Don't underestimate a young man's potential" to Hermione, Nalan Yanran, and Granger. Lin Yu was dumbfounded. If Harry Potter was Xiao Yan, then the annulment plot shouldn't concern him, right? Fortunately, he could recite those embarrassing, melodramatic lines in Chinese, at least enough to fool the system's task. Later, while the young wizards flew through the sky on broomsticks, Lin Yu could only fly on a sword. And when Dementors swarmed the heavens, Lin Yu, holding the Ten Thousand Souls Banner, fell into deep thought.