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来自维基百科,自由的百科全书
北齐置永丰郡,治所在怀戎县(又作怀柔县,今河北涿鹿县西南桑干河南岸保岱镇),与长宁郡同治一县,属于北燕州。北周改北燕州为燕州。隋文帝开皇三年(583年)废永丰郡、长宁郡。怀戎县直属燕州。
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