I'm Creating a Chinese-style Education at Hogwarts

(No system + villainous protagonist + ensemble cast) (PS: Several million-word HP novels already exist, feel free to read) Kong En, Chinese. He entered Hogwarts in 1971 and, after graduating from Slytherin, joined the Ministry of Magic as an outstanding graduate. Using his memories, he helped Fudge become the thirty-second Minister for Magic, earning him a close confidant. To counterbalance Dumbledore, Fudge sent him to Hogwarts as a "Senior Investigator," while Kong En, seeking further advancement within the Ministry, chose to use extreme exam-oriented education methods to rapidly improve student grades, thus enhancing his own political standing. "Now, I will issue the Ministry of Magic's 'Education Order No. 23'!" "Hogwarts will be under closed, centralized management." "Boys will have buzz cuts, girls will have short, shoulder-length hair, uniform hairstyles, uniform clothing." "Timers will be installed in the toilets." "Male..."