The second step consists of the Inner Mongolia, Loess and Yunnan Guizhou plateaus, and the Tarim, Junggar and
The third step, about 500 – 1,000 meters in elevation, begins at the line from the Greater Hinggan, Taihang, Wushan and Xuefeng mountain range eastward to the sea coast.
To the east of the third step the shallow waters of the continental shelf, an extension of the land into the ocean, form the fourth step of the staircase. The depth of the water here is less than 200 meters.
Great quantities of mud and sand have been carried here by the rivers.
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