The northwestern region

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complete control over the entire country, except when an unusually strong dynasty was in power. In many instances the Sichuan Basin—an isolated region in southwestern China, about twice the size of Scotland, that is well protected by high mountains and is self-sufficient in agricultural products—became an independent kingdom. A comparable situation often arose in the Tarim Basin in the northwest. Linked to the rest of China only by the Gansu Corridor, this basin is even remoter than the Sichuan, and, when the central government was unable to exert its influence, oasis states were established.


only the three strong dynasties—the Han (206 bce–220 ce), the Northeast Mobile Number List Tang (618–907 ce), and the Qing, or Manchu (1644–1911/12)—were capable of controlling the region.Apart from the three elevation zones already mentioned, it is possible—on the basis of geologic structure, climatic conditions, and differences in geomorphologic development—to divide China into three major topographic regions: the eastern, northwestern, and southwestern zones. The eastern zone is shaped by the rivers, which have eroded landforms in some parts and have deposited alluvial plains in others; its climate is monsoonal (characterized by seasonal rain-bearing winds).



The northwestern region is arid and eroded by the wind; it forms an inland drainage basin. The southwest is a cold, lofty, and mountainous region containing intermontane plateaus and inland lakes.The three basic regions may be further subdivided into second-order geographic divisions. The eastern region contains 10 of these, the southwest contains two, and the northwest contains three. Below is a brief description of each division.The eastern regionThe Northeast PlainDa Hinggan (Greater Khingan) RangeDa Hinggan (Greater Khingan) RangeDa