Architecture, Building and Structure Design Sunac Chongqing A One Mixed Use Retail by Aico Ltd A One is Chongqing's future landmark, embracing energy, arts and prosperity. Located in the heart of Chongqing's financial district, the project is surrounded on three sides by parks with a commanding 270 degree view of the river. The project is envisioned to be a "City in the Clouds"- with the "clouds" being interpreted as the podium, which brings together the complexities of various functions behind a combination of horizontal metal lines and ultra-clear glass, creating a backdrop of light, shadows, reflections that changes throughout the day.