Kaigo (English spelling) jiè háo

Japanese: 界壕 - かいごう（英語表記）jiè háo

A defensive facility built by the Jin Dynasty in China on the northwestern border to prepare for the invasion of Mongolian nomads. Although it had been partially built at the time of the founding of the state, Zhangzong carried out a major reconstruction after 1192 (the 3rd year of Mingchang) when nomadic activity intensified. However, this cost a huge amount of money and strained the national finances. The remains of the Great Wall (only earthworks and trenches remain) that begins on the west bank of the Nen River in the Moli Dahua Autonomous Banner in Heilongjiang Province and continues southwestward along the Greater Khingan Mountains, splitting into three branches along the way.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

中国，金朝がモンゴル系遊牧民の侵入に備えて西北辺境に築いた防御施設。すでに建国当初から部分的に築いていたが，遊牧民の活動が激しくなった1192年(明昌3)以後章宗が大改築を行った。しかし，そのために莫大な経費を費やし，国家財政は疲弊した。現在，黒竜江省莫力達瓦ダフール(達斡爾)族自治旗の嫩江（のんこう）西岸から始まって大興安嶺沿いに途中三すじに分かれながら南西方向に続いている長城(土塁と塹壕が残る)がその遺跡である。

出典　株式会社平凡社世界大百科事典第２版について　情報

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