《明史·列传·卷一百二十七》
正好赶上朵颜长昂多次骚扰边防，蓟镇总兵官杨四畏没有能力防御，于是把杨四畏调往保定，而调张臣来代替他。
会朵颜长昂屡扰边，蓟镇总兵官杨四畏不能御，乃调四畏保定，而徙臣代之。
Just when Dayan Chang'ang repeatedly harassed the border, Yang Siwei, General Officer of the Jizhou garrison, was incapable of defending the border. He was relocated to Baoding, and Zhang Shen was called to replace him.
<s>[INST] Convert the following English text into Classical Chinese: Just when Dayan Chang'ang repeatedly harassed the border, Yang Siwei, General Officer of the Jizhou garrison, was incapable of defending the border. He was relocated to Baoding, and Zhang Shen was called to replace him. [/INST] 会朵颜长昂屡扰边，蓟镇总兵官杨四畏不能御，乃调四畏保定，而徙臣代之。</s>
Convert the following English text into Classical Chinese: Just when Dayan Chang'ang repeatedly harassed the border, Yang Siwei, General Officer of the Jizhou garrison, was incapable of defending the border. He was relocated to Baoding, and Zhang Shen was called to replace him.
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会朵颜长昂屡扰边，蓟镇总兵官杨四畏不能御，乃调四畏保定，而徙臣代之。
assistant