Territory

Historical political divisions
Main article: History of the political divisions of China
Top-level political divisions of China have altered as administrations changed. Top levels included circuits and provinces. Below that, there have been prefectures, subprefectures, departments, commanderies, districts, and counties. Recent divisions also include prefecture-level cities, county-level cities, towns and townships.

Most Chinese dynasties were based in the historical heartlands of China, known as China proper. Various dynasties also expanded into peripheral territories like Inner Mongolia, Manchuria, Xinjiang, and Tibet. The Manchu-established Qing Dynasty and its successors, the ROC and the PRC, incorporated these territories into China. China proper is generally thought to be bounded by the Great Wall and the edge of the Tibetan Plateau. Manchuria and Inner Mongolia are found to the north of the Great Wall of China, and the boundary between them can either be taken as the present border between Inner Mongolia and the northeast Chinese provinces, or the more historic border of the World War II-era puppet state of Manchukuo. Xinjiang's borders correspond to today's administrative Xinjiang. Historic Tibet occupies all of the Tibetan Plateau. China is traditionally divided into the boundary being the Huai River and Qinling Mountains.


Geography and climate

Main geographic features and regions of China.
Composite satellite photoChina ranges from mostly plateaus and mountains in the west to lower lands in the east. Principal rivers flow from west to east, including the Yangtze (central), the Huang He (Yellow river, north-central), and the Amur (northeast), and sometimes toward the south (including the Pearl River, Mekong River, and Brahmaputra), with most Chinese rivers emptying into the Pacific Ocean.

In the east, along the shores of the Yellow Sea and the East China Sea there are extensive and densely populated alluvial plains. On the edges of the Inner Mongolian plateau in the north, grasslands can be seen. Southern China is dominated by hills and low mountain ranges. In the central-east are the deltas of China's two major rivers, the Huang He and Yangtze River. Most of China's arable lands lie along these rivers; they were the centers of China's major ancient civilizations. Other major rivers include the Pearl River, Mekong, Brahmaputra and Amur. Yunnan Province is considered a part of the Greater Mekong Subregion, which also includes Myanmar, Laos, Thailand, Cambodia, and Vietnam[9].

In the west, the north has a great alluvial plain, and the south has a vast calcareous tableland traversed by hill ranges of moderate elevation, and the Himalayas, containing Earth's highest point, Mount Everest. The northwest also has high plateaus with more arid desert landscapes such as the Takla-Makan and the Gobi Desert, which has been expanding. During many dynasties, the southwestern border of China has been the high mountains and deep valleys of Yunnan, which separate modern China from Burma, Laos and Vietnam.

The Paleozoic formations of China, excepting only the upper part of the Carboniferous system, are marine, while the Mesozoic and Tertiary deposits are estuarine and freshwater or else of terrestrial origin. Groups of volcanic cones occur in the Great Plain of north China. In the Liaodong and Shandong Peninsulas, there are basaltic plateaus.

The climate of China varies greatly. The northern zone (containing Beijing) has summer daytime temperatures of more than 30 degrees Celsius and winters of Arctic severity. The central zone (containing Shanghai) has a temperate continental climate with very hot summers and cold winters. The southern zone (containing Guangzhou) has a subtropical climate with very hot summers and mild winters.

Due to a prolonged drought and poor agricultural practices, dust storms have become usual in the spring in China.[10] Dust has blown to southern China and Taiwan, and has even reached the West Coast of the United States. Water, erosion, and pollution control have become important issues in China's relations with other countries.

from http://en.wikipedia.org/wiki/China