You can complain about the price increase of the postgraduate entrance examination hotel.

Exceeding the government guidance price. The price increase of the postgraduate entrance examination hotel depends on whether the hotel charges exceed the government-guided price. If not, if the price increase is predictable, there is nothing wrong with it. You can report it to the price bureau, otherwise you don't have to eat. Consumers can negotiate with merchants, report to local price supervision departments and industrial and commercial administrative departments, or bring a lawsuit to the court, asking them to bear the liability for damages for breach of contract.