This is how Apple phones are installed. Apple mobile phone users can download and install the QR code by scanning the code scanner function in the drop-down control center at the top of the mobile phone, or open the WeChat scanning function of the mobile phone to download. The post station is the place where officials who passed military information boarded the bus and changed horses on the way in ancient times.

Brief introduction of postal station

The development of post stations began in the Qin Dynasty. In 22 1 BC, Qin Shihuang unified the six countries, and the following year ordered the construction of Chidao with Xianyang as the center and leading to all parts of the country. On these ancient roads, the Qin empire set up waiting rooms, houses, pavilions and other service facilities for ordinary pedestrians to rest, stay, post offices, pavilions and post offices, mainly to deliver official documents and receive officials.

In the Tang Dynasty, the Yuan Dynasty became prosperous. In the Tang Dynasty, a car company was set up to take charge of the national post stations, with a total of 1639 post stations, 7 domestic and 7 international, with a total length of 50,000 kilometers, and the fastest delivery speed of official documents can reach 300 miles per day. When Cen Can, a poet in the Tang Dynasty, went to Longshan for the first time, he recorded the development of the post office system as a judge of Yuwen.