河间在春秋属燕国之域，战国时期分属燕、赵二国，秦属巨鹿郡。

Hejian Yan State in the Spring and Autumn are the domain, belong to the Warring States period Yan, Zhao two countries, Qin is Julu County.

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在从公元前5世纪至公元前221年的战国时期，秦、魏、赵、齐和燕各国建立广泛的防御工事来保卫自己的边界。

During the Warring states Period from the 5th century BC to 221 BC, the states of Qin, Wei, Zhao, Qi and Yan all constructed extensive fortifications to defend their own borders.

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