Conceived as a one-stop-service to the business man who travels around, this, 2.4 million square feet building accommodates many functions related to trade and traveling including merchandise exhibition, business consultation and negotiation, accommodation facilities such as hotel, and check-in/custom clearance facilities for air travel. As a means to resolve the constraint of narrow site, the complex and spacious functions are stacked around the 6-story-high atrium on the elevated artificial ground. The atrium mimics an outdoor space so that the offices on the upper floors has a feeling of facing out door with ample natural lighting.