China is an ancient civilization with thousands of years of heritage, in the long historical years, Chinese has been self-improvement, with wisdom and wisdom all over the world, ancient China in science and technology, economy, culture and development are second to none, whether it is ancient or today, the transmission of information is quite important, everyone has heard of the "eight hundred miles urgent", but how fast is the eight hundred miles urgent? If it is put to the present, it is estimated that the express delivery will not catch up.
The transmission of information can sometimes determine the life and death of a country, so it is particularly important, in ancient times, there was no telephone, there was no means of transportation with super speed, but they still needed fast and accurate information transmission, they used fire and wolf smoke, they used fast horses and whips, and the speed of receiving messages was still quite impressive. When it comes to fast horses and whips, we have to say "eight hundred miles plus urgent", what is eight hundred miles urgent? Film and television dramas may often appear, but those are not true, the so-called "eight hundred miles of urgency", can only be used by the ancient imperial court and the government in wartime or in case of emergency to transmit information, usually rarely used, because this method will cost a very high price.
In ancient times, there were many stations, especially from the beginning of the Tang Dynasty, the imperial court in various regions of the country, including cities, towns have set up stations, these stations are in order to make it more convenient to get information to be transmitted, the state also invested a lot of money and manpower and material resources in the station every year, in the need to quickly convey information through the station. If there is a particularly urgent military intelligence or secret documents of the imperial court, the messenger of the station will be sent to start the "eight hundred mile expedited", the focus of the eight hundred mile expedited, the first is a "fast" word, the second is an urgent word, and the transmission of these important information requires the letter to reach the destination at a very high speed.
There is almost one in the caravanserai for almost 20 miles, the messengers ride on the official road, although the horses run very fast, but they are also easy to get tired, so when the horses are tired, they need to go to the station to change horses, the station will prepare these in advance, but there are often cases of running dead horses and tired people, in case of emergency, many BMW foals can not withstand the long journey, riding is an extremely dangerous and injurious thing, a careless, may be on horseback to fall to death or all night to send a letter, exhausted.
The ordinary transmission speed of the station is 300 miles a day, but in case of emergency, people can travel day and night, the fastest can reach 400 miles, 600 miles, 800 miles a day, the fastest speed can reach thousands of miles a day, the cost of using "eight hundred miles plus" is very huge, once Yang Guifei wanted to eat lychees, Tang Xuanzong used eight hundred miles of urgent, this practice is extremely luxurious, but Yang Guifei quickly ate fresh lychees, this kind of lychee was also given a nice name, called "concubine laugh", The speed of eight hundred miles plus an emergency, even if it is placed, will make many couriers out of reach.