MacauMacau or Macao (məˈkaʊ, ; mɐˈkaw; , ōu.mǔːn), officially the Macao Special Administrative Region of the People's Republic of China (MSAR), is a city and special administrative region of China in the western Pearl River Delta by the South China Sea. With a population of about 680,000 and an area of , it is the most densely populated region in the world. Formerly a Portuguese colony, the territory of Portuguese Macau was first leased to Portugal as a trading post by the Ming dynasty in 1557.
ShenzhenShenzhen (ˌʃɛnˈdʒɛn; ʃɛnˈʒɛn; ; AUDShenzhen pronunciation.oggshen1.zhen4) is a city and special economic zone on the east bank of the Pearl River estuary on the central coast of the southern Chinese province of Guangdong, bordering Hong Kong to the south, Dongguan to the north, and Huizhou to the northeast. With a population of 17.56 million in 2020, Shenzhen is the third most populous city by urban population in China after Shanghai and Beijing.
GuangzhouGuangzhou (UKgwaeŋ'dʒəʊ, , USgwQŋ-, ; ; kwɔ̌ːŋ.tsɐ̂u or kwɔ̌ːŋ.tsɐ́u), also known as Canton (kaen'tQn, ; and alternatively romanized as Kwongchow or Kwangchow), is the capital and largest city of Guangdong province in southern China. Located on the Pearl River about north-northwest of Hong Kong and north of Macau, Guangzhou has a history of over 2,200 years and was a major terminus of the maritime Silk Road; it continues to serve as a major port and transportation hub as well as being one of China's three largest cities.