The capital city is Beijing and Shanghai is the city with the most people living in it. Along with the cities of Tianjin and Chongqing, these four cities are "municipalities" directly controlled by the national government. Two other cities are given the status of "special administrative region" (SAR). They are Hong Kong, which was once a colony of the United Kingdom and given back to China in 1997 and Macau, which Portugal gave back in 1999. These two cities remain highly autonomous or have much of their own power. Aside from the "municipalities" and the "SARs", there are 23 provinces and five "autonomous regions" or regions with more law-making rights than the provinces and with many people of a minority group population. They are the Xinjiang Uyghur Autonomous Region, the Tibet Autonomous Region or Xizang Autonomous Region, the Guangxi Zhuang Autonomous Region, the Inner Mongolia Autonomous Region or Nei Mongol Autonomous Region and the Ningxia Hui Autonomous Region.