Chongqing is a megacity in southwest China. Administratively, it is one of the four municipalities under the direct administration of central government of the People's Republic of China (the other three are Beijing, Shanghai and Tianjin), and the only such municipality located far away from the coast. The municipality of Chongqing, which is around the size of Austria, includes the city of Chongqing and various non-connected cities. As the Chongqing municipality government directly administers the city of Chongqing, as well as rural counties, and other cities not connected to the city of Chongqing, Chongqing municipality can technically claim to be the largest city proper in the world, even though this is due to a classification technicality and not because it is actually the world's largest urban area.

Chongqing is situated at the transitional area between the Tibetan Plateau and the plain on the middle and lower reaches of the Yangtze River in the sub-tropical climate zone often swept by moist monsoons. It often rains at night in late spring and early summer, and thus the city is famous for its "night rain in the Ba Mountains", as described by poems throughout Chinese history including the famous Written on a Rainy Night-A Letter to the North by Li Shangyin. The municipality reaches a maximum width of 470 kilometres (290 mi) from east to west, and a maximum length of 450 km (280 mi) from north to south. It borders the following provinces: Hubei in the east, Hunan in the southeast, Guizhou in the south, Sichuan in the west and northwest, and Shaanxi to the north in its northeast corner.

Chongqing has a humid subtropical climate, bordering on a monsoonal humid subtropical climate and for most of the year experiences very high relative humidity, with all months above 75%. Known as one of the "Three Furnaces" of the Yangtze river, along with Wuhan and Nanjing, its summers are long and among the hottest and most humid in China, with highs of 33 to 34 °C (91 to 93 °F) in July and August in the urban area. Winters are short and somewhat mild, but damp and overcast. The city's location in the Sichuan Basin causes it to have one of the lowest annual sunshine totals nationally, at only 1,055 hours, lower than much of Northern Europe; the monthly percent possible sunshine in the city proper ranges from a mere 8% in December and January to 48% in August. Extremes since 1951 have ranged from −1.8 °C (29 °F) on 15 December 1975 (unofficial record of −2.5 °C (27 °F) was set on 8 February 1943) to 43.0 °C (109 °F) on 15 August 2006 (unofficial record of 44.0 °C (111 °F) was set on 8 and 9 August 1933).

More introductions to Chongqing please visit: https://en.wikipedia.org/wiki/Chongqing

Hong Kong, officially the Hong Kong Special Administrative Region of the People's Republic of China, is a specially administered territory on the eastern side of the Pearl River estuary in southern China. With over 7.4 million people of various nationalities in a territory of 1,104 square kilometres (426 sq mi), Hong Kong is the fourth-most densely populated region in the world.

Hong Kong was formerly a colony of the British Empire, after Qing China ceded Hong Kong Island at the conclusion of the First Opium War in 1842. The colony expanded to the Kowloon Peninsula in 1860 after the Second Opium War and was further extended when Britain obtained a 99-year lease of the New Territories in 1898. The entire territory was returned to China when this lease expired in 1997. As a special administrative region, Hong Kong's system of government is separate from that in mainland China.

Originally a lightly populated area of farming and fishing villages, the territory has become one of the most significant financial centres and trade ports in the world. It is the world's seventh-largest trading entity and its legal tender, the Hong Kong dollar, is the 13th-most traded currency. Although the city boasts one of the highest per capita incomes in the world, it suffers severe income inequality.

The territory features the largest number of skyscrapers in the world, most of them surrounding Victoria Harbour. Hong Kong ranks 7th on the UN Human Development Index and has the seventh-highest life expectancy in the world. Over 90% of its population makes use of well-developed public transportation, but air pollution from neighbouring industrial areas of mainland China has resulted in a high level of atmospheric particulates.

More introductions to Hong Kong please visit: https://en.wikipedia.org/wiki/Hong_Kong