Zifeng Tower is a 450-meter (1,480 ft) supertall skyscraper in Nanjing, Jiangsu. The 66-story building completed in 2010 comprises retail and office. Floors 49–71 feature a hotel, numerous restaurants, and a public observatory. The tower's stepping is functional; office, hotel, and retail are located above grade, while the restaurants and the public observatory are housed at the top of the tower. The building is currently the tallest in Nanjing and Jiangsu province, the eleventh tallest in China and the twentieth tallest in the world.