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简介：In this life, in the seventeenth year of Chongzhen, after Dorgon became the auxiliary king, in order to establish his prestige, he also led his army to quickly sweep away and captured the Zhongyou Suo and the former garrison closer to Shanhaiguan, and separated Shanhaiguan and Ningyuan. The connection between them was completely destroyed, leaving only Ningyuan alone.