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简介：Jianlu came from the northeast, and the north of Jizhou is surrounded by mountains. There is a Great Wall on the mountain. The mountain road is rugged and difficult for horses to travel. It is not suitable for Jianlu's cavalry. Moreover, even if the Great Wall in the north is broken through, Jizhou still lies in front of Jianlu and cannot be captured. Jizhou, they still couldn't pass.