Taoyuan airport terminal 4 is planned to be built to respond the problem of over-crowded. It contains 55 million of annual passengers. The concept comes from the central mountain range of Taiwan and the transmeridional rivers. Because of the linear site, the terminal is separated into head house and satellite, connected by underground APM (automated people mover). With the intersect of departure and arrival circulation to enhance passenger experience, the river-shaped suspended bridge for arrival and the waterfall are the best indication for passengers, dense signs are needless.