During the late Western Han Dynasty, Wang Mang adopted an erroneous policy in regard to the Huns and undermined the peace of over 100 years that had been in effect since the time of Emperor Xuan.

• 在西汉晚期，王莽通过了一项错误的政策，关于匈奴和破坏和平的超过100年已经开始生效的时间皇帝宣。