What Is a Ladder Line?

The altitude of China's west is high, and the altitude of its east is low. China's land topography can be divided into three steps. The stepwise distribution makes most rivers in our country flow from west to east.

Three major stairs of Chinese terrain

Kunlun Mountains-Altun Mountains-Qilian Mountains-Hengduan Mountains

Daxinganling-Taihang Mountains-Wushan-Xuefeng Mountain

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