Zifeng Tower (Greenland Center-Zifeng Tower or Greenland Square Zifeng Tower, formerly Nanjing Greenland Financial Center) is a 450-metre (1,480 ft) supertall skyscraper in Nanjing, Jiangsu. The 66-story building completed in 2010 comprises retail and office space in the lower section. The floors near the top feature a hotel, numerous restaurants, and a public observatory. The tower’s stepping is functional, helping separate these sections. The building is currently the tallest in Nanjing and Jiangsu province, the sixth tallest in China and the twentieth tallest in the world.