What if the fake bay window property is not allowed to knock?

This situation is illegal and you can complain to the real estate bureau.

Bay windows have been determined in architectural planning and belong to a part of the house. The owner has the right to modify or remove the bay window. Property companies or property personnel have no right to interfere with the owner's decoration or removal of bay windows, and the owner shall not damage the building structure or affect the safe use of the building during the decoration or removal.