As early as the early days of human social development, communication has been generated. According to the ancient books and excavated cultural relics to infer, our ancestors did not invent writing and use vehicles, it is likely that they used the way of object representation to communicate with each other, people in social life and mutual interaction use certain specific objects, used to indicate a certain symbolic meaning, such as using peppers to indicate that they have encountered great difficulties, handkerchiefs to indicate dating, jewelry to represent love, swords to indicate that there is going to be a war, etc.
The method of communication in terms of objects is a very primitive method. Later, as people came and went, and the scope became more and more extensive, organized communication methods began to appear. For example, by lighting a beacon to transmit military information, the princes of all walks of life will send troops to help and jointly resist the enemy when they see the beacon. The most famous allusion to the Beacon Transmission is that king You of Zhou smiled at Bo and played the princes of beacons.
Because the beacon letter could not convey the detailed enemy situation from the border, let alone convey the above orders. Therefore, with the development of society and the needs of politics and military affairs, a stricter postal system for transmitting official documents was also formed, which was used in conjunction with beacons. "Post" is a step delivery, "yi" is a horse delivery, and during the Western Zhou Dynasty, China already had a relatively complete postal system. During the Spring and Autumn Period and the Warring States Period, with the political, economic and cultural progress, postal communications were gradually perfected. During the Three Kingdoms period, Cao Wei's greatest achievement in the history of postal stations was the formulation of the Postal Order. One of the signs of the development of the Sui and Tang dynasty postal and communication undertakings was the increase in the number of stations. During the Yuan Dynasty in China, there was a great development of postal stations.
At the end of the Qing Dynasty, the post system was reformed, the biggest feature was the merger of "post" and "post", and the post station gradually evolved into a post office, receiving private letter delivery business, and becoming a national postal system "officially run by the people". After the middle of the Qing Dynasty, with the establishment of modern postal services, the ancient postal system was gradually eliminated.
After the middle of the 19th century, with the invention of the telegraph and telephone, the discovery of electromagnetic waves, the field of communication has undergone great changes, the use of metal wires to transmit information, wireless communication through electromagnetic waves, the mythical 'thousand miles of sound' and 'downwind ear' became possible. Since then, the transmission of information with electrical signals as a carrier can break away from the conventional audiovisual perception and begin a new era of communication.
Learn from and think far
Han Mo Piaoxiang Ancient City Xi'an
In the look, tap it