The Bel-Air, that top story of the New Building, was a sort of large hall, with a Mansard roof, guarded with triple gratings and double doors of sheet iron, which were studded with enormous bolts.

• 气爽楼在新大楼的顶层，是一大间顶楼，有几道装了三层铁栏的门和两面都装了铁皮并布满特大铁钉的板门。