Yunnan, referred to as Yun (Yunnan), the provincial capital of Kunming, is located in the southwest of China's frontier, the Tropic of Cancer crosses the southern part of Yunnan Province, is a low-latitude inland area, the eastern part of Guizhou, Guangxi is neighboring, the northern part is connected to Sichuan, the northwestern part of the country is close to Tibet, the western part of the country is bordered by Burma, the southern part of the country is adjacent to Laos, Vietnam, 25 border counties of Yunnan are respectively bordered by Burma, Laos and Vietnam, with the length of the national boundary line 4060 Yunnan has 25 border counties with Myanmar, Laos and Vietnam, with a national border of 4060 kilometers, and is China's window and gateway to Southeast Asia and South Asia.
Yunnan is one of the important birthplaces of human civilization. The Yuanmou people, who lived 1.7 million years ago, are the earliest human beings found in China and Asia. During the Warring States period, it was the birthplace of the Dian tribe. Yunnan is known as the South of Colorful Clouds and Colorful Yunnan, which is also known as "South of the Cloud Ridge".
Yunnan has a total land area of 394,100 square kilometers, accounting for 4.1% of the country's total land area, ranking 8th in the country, with a total population of 47,705,000 people (2016), making it the province with the largest number of ethnic groups in China, with 8 municipalities and 8 ethnic minority autonomous prefectures under its jurisdiction.
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Yunnan Geography:
1 Location
Yunnan Province has a total area of about 390,000 square kilometers, or 4.11% of the country's area, and is ranked 8th in area among the country's provincial-level administrations.The Tropic of Cancer passes through the southern part of the province. The province is bordered by the Guangxi Zhuang Autonomous Region and Guizhou Province to the east, Sichuan Province to the north, and the Tibet Autonomous Region to the northwest. Yunnan's national border is 4,060 kilometers long, and it shares borders with three countries: Myanmar to the west (the main port of entry is Ruili), Laos to the south (the main port of entry is Mohan), and Vietnam to the southeast (the main port of entry is Hekou).
2 Climate
Yunnan's climate is characterized by seven temperature zones of climate types, including the northern tropical, southern subtropical, central subtropical, northern subtropical, warm temperate, mesothermal and plateau climate zones.? Yunnan's climate is characterized by both low-latitude climate, monsoon climate and mountainous plains climate. Its main manifestations are:
3 Regional differences and vertical variations in climate
Yunnan's latitude and altitude are related. From the latitude, its location is only equivalent to the geographic latitude from the Leizhou Peninsula to the area of Fujian, Gan, Xiang, Qian, but due to the terrain of the north is high and the south is low, the height difference between the north and the south of the disparity between the 6663.6m, greatly exacerbated the province-wide temperature difference due to latitudinal factors. This combination of high latitude and high altitude, low latitude and low altitude, that is, the horizontal direction of the latitude increase with the vertical direction of the altitude increase coincides with the situation. So that the average annual temperature of each place, in addition to the Jinsha River Valley and Yuanjiang River Valley, roughly increasing from north to south, the average temperature in the 5 ~ 24 ℃, the difference between the north and south of the temperature up to 19 ℃ or so.
Because of the influence of the terrain and the weather system, the province's temperature distribution of latitudinal patterns often appear in a special situation, the emergence of the "north side of the hot south side of the cool" phenomenon. Especially in the vertical distribution, due to the territory of mountainous, deepening the riverbed by erosion, the formation of mountains and valleys, from the valley to the top of the mountain, there are due to the height of the rise in the type of climate differences, the general plateau of every 100m, that is, the temperature is lowered by about 0.6 ℃.
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