My hometown Zhang Zhaoyang 张朝阳 庆 庆 阳 阳Terrain【地形】 In the middle of the loess luis plateaupltu(黄土高原) High altitude Eroding canyons(风水侵蚀地貌)Climate Semiarid areas 【半干旱地区】; Annual average temperature:4C12C; Annual rainfall:400600mm; Dry index:1.52.0; Evaporation 【蒸发量】Precipitation 【降水量 】黄河象 3millionyearsago,theHimalayasdidnotexist. IntheeastofGansutherewasagiantlakebigger thantodays里海(CaspianSea). Oncetheclimatewaswarmandwet,黄河象 (YellowRiverElephant)livedhappilyinthereuntil orogenyrdn造山运动 destroyedt