Suiseki is a major type in Chinese viewing stones, with large quantity, varied shapes and patterns. When running water ladened with mud and sand, a process that the rocks were wore and moved, we named it Water Erosion Action. It is related with strong or weak water erosion action, and flow and velocity of water stream, and jumbled fluid medium, particle size of sand in the water.

Under mechanical and physical action, water erosion action was divided into two types, wear erosion and roll erosion. Wear erosion is water with mud and sand strike and wear a relatively suiseki, this type of suiseki was common in near parent rock or original place. Most of stones are presented irregular circular and huge shape, such as Guangxi Dahua stone, Duan stone, and so on.

Roll erosion was the rock of under water, the process that by moving action of running water, rock slides, roll, jump and striking between rocks and rocks. After a long distance rolling action, The rocks lost edges itself, have became a round, oval, or flat shape. Roll erosion action is a major cause in suiseki, especially river pebble, such as Yangtze River stone, Huanghe stone, Rain flower stone, Jingshajiang river stone, etc.

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