The desert lonely city, the faded battle flag, the mottled white hair, the blood-stained long tasseled ...... Song Yun traveled to the border military town of another world, was taken in by veterans, and became the only young man in the city. The enemy soldiers approached the city, and the three thousand veterans were isolated and helpless, and all of them died heroically. Song Yun picked up a bronze sword and became the last guard of the Anxi Military Town. One man and one sword defend the lonely city. Alone against a million soldiers. Since then, the legend of the white-robed Sword Emperor has begun. In the past 70 years, there have been many famous commanders from all over the world, and the elite soldiers are like clouds, and the army has attacked the city of Anxi all the way, but they can only hate and be defeated. Seventy years later, Song Yun drifted out of the city, causing a sensation all over the world and shocking all countries. The heroic generals are not arrogant, and thousands of troops avoid white robes!