Actually, exchanging tickets is easy, I'm just annoyed with the person who checked the tickets. They didn't even measure the height, and they told me it was 80cm, so I had to pay. When I checked the height, it was actually less than 80cm, haha, are you a fortune teller? They even knew the height of a small child. Please fix this!! And the height must be checked to be real, don't just guess the height, Wonderland staff.