The Zhujiang (meaning Pearl River in Chinese) Tower is a "green energy" building located in Guangzhou's new central business district. American architects Adrian Smith and Gordon Gill won the contract to design this smart skyscraper, which produces as much energy as it consumes. The Zhujiang Tower is featured with built-in solar panels, wind power generators, world's first cool radiator to replace A/C, double-glazed windows for insulation, and special ventilation system.