Although there are no eight regiments of Zhang Xiaojing guarding beacon towers in history, there really is a Tang Jun who sticks to his post, a famous defense expert. From them, we can see countless shadows of Zhang Xiaojing and the Eighth Regiment. This famous soldier who created a miracle in China's military history because of "defending one city and protecting the world" is Zhang Xun.

Zhang Xun was the county magistrate of Zhenyuan in the last years of Kaiyuan. When the Anshi Rebellion broke out, Zhang Xun's boss, the satrap of Qiaoxian County, surrendered to the Anshi Rebellion and ordered Zhang Xun as a special envoy to meet the rebels. "I led a hundred officials to the Xuanyuan Emperor Temple to cry, so I set out to ask for thieves and followed more than a thousand people." However, Zhang Xun led the soldiers and civilians of zhenyuan county to the Laozi Temple and cried bitterly, calling on all the soldiers and civilians to join him in resisting the Anshi Rebellion.

It is worth mentioning that Zhang Xun is not a military attache, but an authentic civilian, but it is such a scholar and a small county magistrate who embarked on the most cruel battlefield on the first day of the fifteenth year of Kaiyuan. Zhang Xun had no military training all his life, but he was patriotic and upright.

To resist the rebels, but his military mind and talent are amazing. With only 2,000 men, Zhang Xun defeated 40,000 rebels and captured 2,000 Hu Bing, with an amazing record.