Although the name is? 800 Li urgent? But this is an exaggeration. The actual situation can run about 300 miles a day. However, once it is used, it is the most urgent thing for the country. Generally speaking, it is not possible to use 800 Li to rush. It is conceivable that this is of great significance to the court.
In ancient times, in order to deliver news as soon as possible, a post station was set up. There is usually a post station about 20 miles away. For these 800-mile dispatches, the messenger will change horses at each post station, so as to achieve the effect of running all the time. Compared with ancient means of transportation, horses also need rest.
As for why bandits dare not go forward to rob, I think as long as a little sensible bandits will not choose to start work. First of all, these 800-mile urgent people have obvious signs to let outsiders know that they are sending information to the court at this time. And these are basically documents, letters and news, not gold and silver jewelry. These things are quite important to the imperial court, but they are worthless to bandits.
Besides, even if these couriers have great wealth, bandits dare not rob them desperately. Don't say whether it's urgent within 800 miles. As long as it's bandits who send messages to the court, they dare not do it. You know, once these bandits start work, they will anger the court. The imperial court generally doesn't care or bother to deal with bandits, but once they rob the imperial court, the army will gather immediately, and no matter how strong the bandits are, they can't stand the blow of the imperial army.