《资治通鉴·梁纪·梁纪十七》
侯景又制造了一种攀登城墙的高楼战车，高十多丈，想用它居高临下向城里射箭。
景又作登城楼，高十馀丈，欲临射城中。
Hou Jing also built a high battle wagon to climb the city wall, which was more than ten feet high, and he wanted to use it to shoot arrows into the city from a high position.