The whole journey is about 136.72 km.

The running time of a horse is related to its speed. Take Mongolian horse as an example. A normal Mongolian horse can walk 60 kilometers in 8 hours a day, which is the most normal walking speed of a Mongolian horse. Of course, the running speed of horses is faster than this. For example, the sprint speed of blood horses is 60 kilometers per hour, so it is necessary to build a post station to deliver official documents in ancient times. Generally, the speed of urgent documents is 300 miles per day, and the fastest is 600 miles per day.