China's Ministry of Housing and Urban-Rural Development and Ministry of Emergency Management announce in a joint statement that cities with a population of more than three million people are not allowed to construct skyscrapers taller than 500 metres (1,600 ft) and need a special exemption in order to construct a building taller than 250 metres (820 ft). The ministries also announce that cities with a population of less than three million people are not allowed to construct skyscrapers taller than 250 metres (820 ft) and need a special exemption in order to construct a building taller than 150 metres (490 ft).