It's a branch library, not on which floor. Nansha District Library "Yuexiu Guojin Sky Library" is jointly built by Nansha District Library, Guangzhou Juanjing No.1 Real Estate and Guangzhou Yuexiu Yicheng Commercial Operation Management Co., Ltd. It is another branch jointly built by Nansha District Library and social forces. Not on the first floor of the building, but in the air corridor between two IFC office buildings. Because it is located in the air corridor of two buildings, it is more than 60 meters above sea level 100, and the second floor is about 9 meters high, so it is named "air library".