Add Fat and Light the Lamp (1)

In the summer, it's my thirteenth birthday, but my parents don't help celebrate my birthday, so I go on a trip to Cairo! Is there any mistake? Is she their biological daughter? After leaving the house, her mother called again to say that she wanted to give her a gift~ But the birthday gift they gave her was actually her brother! Is there any mistake? She is an only child! In front of him is a beautifully wrapped gift box large enough to accommodate three people. She cleared her throat, knocked on the box, and asked innocently: "Brother, are you in there?" No movement? ! Asleep inside? She walked around the box a few times, only to find that it seemed like the box had a door! ~ Open the door and see nothing inside? When she walked in, the door was strangely closed. Waiting for her to open the door... May I ask where this is? Why is it so magnificent? It seems like there is still a party Is there any mistake? Has she traveled through time? ? One