Why doesn't the North Korean Hotel have a fifth floor?

Why doesn't the North Korean Hotel have a fifth floor? The answer is: there should be a fifth floor, but it is not open to outsiders. When traveling in North Korea, a Chinese-American deliberately avoided the surveillance of the North Korean tour guide, and went down the stairs to the fifth floor of Yangjiaodao Hotel with other tourists aged 20-30, and took many photos while exploring. Judging from these photos, the fifth floor doesn't seem mysterious, and there is no department working, just a warehouse. Another tourist arrived at the fifth floor and was found by the guards. On the way to catch up, he found a small staircase. He looked up and found a small space with a low ceiling, so he argued that there should be other unknown spaces on the fifth floor. Two Canadians and Japanese who have been to North Korea said on the Internet that the room was also full of miniature cameras waiting to be repaired. Yangjiao Island International Hotel is one of the two most luxurious super hotels in North Korea (the highest level) (equivalent to a five-star hotel in China). Yangjiao Island, located in the center of Datong River, has pleasant scenery and fresh air. 1995 was completed and opened on July 2nd. It covers an area of 654.38+10,000 square meters, with a total construction area of about 90,000 square meters, a building height of 170 meters and 47 floors. It has more than 1000 rooms of different levels, equipped with modern equipment, and each room has a bedroom and a reception room.