Shanghai Tower (simplified Chinese: 上海中心大厦; traditional Chinese: 上海中心大廈; pinyin: Shànghǎi Zhōngxīn Dàshà; Shanghainese: Zånhe Tsonshin Dasa; lit. 'Shanghai Center Building') is a 128-story, 632-meter (2,073 ft)-tall megatall skyscraper in Lujiazui, Pudong, Shanghai. It is the world's second-tallest building by height to architectural top and it shares the record (along with the Ping An Finance Center) of having the world's highest observation deck within a building or structure at 562 m. It had the world's second-fastest elevators at a top speed of 20.5 meters per second (74 km/h; 46 mph) until 2017, when it was surpassed by the Guangzhou CTF Finance Center, with its top speed of 21 meters per second (76 km/h; 47 mph). Designed by international design firm Gensler and owned by the Shanghai Municipal Government, it is the tallest of the world's first triple-adjacent supertall buildings in Pudong, the other two being the Jin Mao Tower and the Shanghai World Financial Center. Its tiered construction, designed for high energy efficiency, provides nine separate zones divided between office, retail and leisure use.