Foshan[a] is a prefecture-level city in central Guangdong Province, China. The entire prefecture covers 3,848 km2 (1,486 sq mi) and had a population of 9,498,863 as of the 2020 census. The city is part of the western side of the Pearl River Delta Economic Zone whose built-up (or metro) area was home to 65,694,622 inhabitants as of 2020 (excluding Hong Kong not conurbated yet), making it the biggest urban area of the world. Foshan is regarded as the home of Cantonese opera, a genre of Chinese opera; Nanquan, a martial art; and lion dancing.