Who knows that the country requires the width and angle of hotel windows?

As long as it meets the design requirements and does not affect the indoor lighting and ventilation, there is no necessary requirement for the size of the window. The Fire Protection Law and the Architectural Design Regulations are not particularly strict in this respect, so the size of the window depends on the idealized angle of the building and designer. As long as the hotel or residential building meets the design registration requirements, everything else is second.