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Tang government troops retreated with little resistance from all the prefectures in Heshuo ?? area (which includes the present day provinces of Shandong, Hebei and Henan); only Yan Zhenqing's Pingyuan sustained through. He then combined force with his cousin, Yan Gaoqing ???, who was the governor of Changshan ???? (present day Quyang, Hebei),

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