被山带河

Explanation: Relying on Hill, ring the River. Refers to the situation advantageous place. 　　Usage: Joint type; as attribute; describe the difficult terrain 　　Source: Han Liu Xiang, "Warring States Chu policy a": "Qin half a day, the soldiers, the enemy of the four countries, are mountain with river, four plugs that solid." 　　Examples: Qin the most wins, no such Xianyang, ~, Jincheng miles. (Ming Feng Meng, "Eastern Zhou Chi," eighty-seventh back)