Pillar,Yamanaalso.Xi-ZhiYufloods,cuttingofhillswhenthewaterfromthe,sotobreakTongheHill.Theriverdiversion,includingonandoffthemountain,seeifthewatercolumn,Soonthepillar.Third,wemustwear,sparsewaterpointsfingerheadtable,too,saidthethree.补充：砥柱是山名.以前大禹治理洪水时,有大山阻挡水的流动他就把山凿开,所以开山来使河水流通.河水有分支,围绕山流过,山立在水中,就像石柱的样子,因此就叫砥柱.三次打洞，水流渐渐分开，（大的水流变成了小的水流），根据这一现象，所以称它为三门