[Hp]give the Wizarding World Some Turtle Soup

The door key fell out of position, and after a moment of dizziness, Harry found himself in a strange, pure white space. There was nothing here except a few chairs and his equally confused companions. Harry looked around: "The Quidditch World Cup won't be held here, right?" Familiar or unfamiliar faces appeared one after another in the open space, and the uneasy atmosphere disappeared with the appearance of Dumbledore. After the mechanical voice read the rules of turtle soup, it gave the first noodle soup: [Four ears, three ears, one ear] But—— Dumbledore was given a special mission. A voice that only he could hear whispered in his ear: "You are an undercover, and your questions will only be answered with 'yes and no'. Please conceal the identity of the undercover and lead them to failure when asking at least once in each round of the game." Intention: Turtle Soup must ban Dunduoduo!