This high-rise building has been opened to the public. What should I do if the property notice says that it needs rectification?

If you have informed the property and obtained the property permit before changing the window. Then you can ask the property to bear the cost of your window restoration and the original decoration.

Without informing the property, if you change it without permission, you have to restore it yourself.

If you add windows to the load-bearing wall or expand the original window design, this problem will become a big problem, which violates the Measures for the Administration of Residential Decoration and is illegal. Must be restored, and may face a fine from the competent construction department.