Physiographic macroregions of China is a term suggested by an American anthropologist G. William Skinner as a subdivision of China Proper into nine areas according to the drainage basins of the major rivers and other travel-constraining geomorphological features.
They are distinct in terms of environment, economic resources, culture and more or less interdependent histories with often unsynchronized developmental macrocycles.
[1] They were described in Skinner's landmark essays in The City in Late Imperial China.
[2] Skinner and his school maintain that prior to modernization, transportation was largely constrained by terrain and the physiographic macroregions are a close approximation for the socioeconomic macroregions of 19th-century China.
According to Skinner's analysis, the 20th century China excluding Inner Asia has 9 socioeconomic macroregions with cores not changed from the physiographic ones of the 19th century, but with changed territorial extents.