quality:corruption, information:extraction, linguistic:paraphrasing, stylistic:tone, quality:correction
Demographics

The 2010 census found Guangzhou's population to be 12.78 million. As of 2014, it was estimated at 13,080,500, with 11,264,800 urban residents. Its population density is thus around 1,800 people per km. The built-up area of the Guangzhou proper connects directly to several other cities. The built-up area of the Pearl River Delta Economic Zone covers around 17,573 km (6,785 sq mi) and has been estimated to house 22 million people, including Guangzhou's nine urban districts, Shenzhen (5.36m), Dongguan (3.22m), Zhongshan (3.12m), most of Foshan (2.2m), Jiangmen (1.82m), Zhuhai (890k), and Huizhou 's Huiyang District (760k). The total population of this agglomeration is over 28 million after including the population of the adjacent Hong Kong Special Administrative Region. The area's fast-growing economy and high demand for labor has produced a huge "floating population" of migrant workers; thus, up to 10 million migrants reside in the area least six months each year. In 2008, about five million of Guangzhou's permanent residents were hukouless migrants.