Is there a rule for opening balcony windows in Nanchang?

No, high-rise buildings usually open the windows inside. In the relevant national building design codes, it is only stipulated that the opening design of outdoor doors and windows cannot affect the traffic safety of public areas, but it is not mandatory to open indoor windows inward or outward.

Generally speaking, if it is a high-rise building, it is safer for the windows to open inward. For example, when the bay window is open, the owner can be prevented from leaning out of the room.

To this end, when designing high-rise residential buildings, design units usually make indoor windows open inward. However, if the window is open inside, we should consider the design from the perspective of humanization and make it a window that opens inside and leads inside, so as not to affect the normal use of indoor space.