《资治通鉴·汉纪·汉纪十二》
汉武帝见新秦中一带有的地区千里之中竟没有设置亭障，便将北地崐太守及以下有关官员处死。
新秦中或千里无亭缴，于是诛北地太守以下。
When Emperor Wu discovered that there were a thousand li in the Xinqinzhong area that had no walled guard posts, he put to death the grand administrator of Beidi and the officials under him.