Why did the hotel in Huangdao District of Qingdao suddenly increase a lot of money?

I think the relationship between supply and demand determines the price. People's views on the phenomenon that the price of holiday hotels has soared exponentially include that it is reasonable for the price to rise due to the change of supply and demand, it is equally understandable for the price to rise due to the change of operating costs, and it is unreasonable for the price to rise too much, which is not in the interests of all parties.