Most of the region is part of the Pearl River Delta Economic Zone, which is a special economic zone of China. It is currently the wealthiest region in Southern China and one of the wealthiest regions in China along with the Yangtze River Delta in Eastern China and Jingjinji in Northern China. Referred to as the Guangdong-Hong Kong-Macao Greater Bay Area in official documents, the region is one of the most densely populated and urbanized regions in the world, and is considered a megacity by numerous scholars. The Pearl River Delta Metropolitan Region ( PRD Chinese: 珠江三角洲城市圈 pinyin: Zhūjiāng Sānjiǎozhōu Chéngshìquān Jyutping: Zyu 1gong 1 Saam 1gok 3zau 1 Sing 4si 5hyun 1 Portuguese: Delta do Rio das Pérolas (DRP)) is the low-lying area surrounding the Pearl River estuary, where the Pearl River flows into the South China Sea. Guangdong–Hong Kong–Macau Greater Bay Area Cantonese and other varieties of Yue Chinese, Mandarin Chinese, English, Portuguese, Macanese Patois, and numerous other languages

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