Zhuhai is a prefecture-level city on the southern coast of Guangdong province in China. Located in the Pearl River Delta, Zhuhai borders Jiangmen to the northwest, Zhongshan to the north, and Macau to the south. Zhuhai was one of the original Special Economic Zones established in the 1980s. Zhuhai is also one of China's premier tourist destinations, being called the Chinese Riviera. The city's population is made up of mostly Mandarin speaking migrants. Its northern part made of Xiangzhou district is now part of the Guangzhou-Shenzhen built-up area, the biggest built-up area in the world with more than 44,478,513 inhabitants at the 2010 census encompassing the whole Shenzhen, Dongguan, Foshan, Zhongshan, Macao cities, main part of Guangzhou, and small parts of Jiangmen and Huizhou cities. According to a report released in 2014 by the Chinese Academy of Social Sciences, Zhuhai is the most livable city in China.