The Hong Kong-Zhuhai-Macao Bridge Hong Kong Port Passenger Clearance Building houses the customs and immigration facilities for travellers leaving and entering Hong Kong by the bridge. The simple, clear circulation through the facility is reinforced by the waveform roof, providing intuitive wayfinding. The modular roof form ideally lends itself to offsite prefabrication and has enabled an efficient construction process. The four double-height voids over reflecting pools allow natural daylight to penetrate all levels of the building and ensure a visual connection between floors.