China is one of the earliest and most developed countries in the world in terms of postal services. Feudal rulers throughout history have attached great importance to postal services and referred to the postal network as the "bloodline of the country". The name and function of each post station have changed in each period. Yiyin Liunian recorded the names of Gaoyou Post Stations from the Qin Dynasty to the Ming Dynasty: Gaoyou Pavilion, Yinghua Post Station, Gaoyou Post Station, Qin Post Station, Yucheng Post Station, and Qin Post Mansion The official documents sent by the postal workers must be stamped with such a big seal, indicating that there are no problems in the Gaoyou process, they must arrive on time, be complete, stamped with a big seal, and continue to the next station. Because all the documents sent are official documents, the sealing of the documents is guaranteed to be complete. If there are any abnormalities, they will be returned and the responsibility of the previous website will be pursued. The document must be: can only arrive early, cannot arrive late. Being late will result in severe punishment. Generally, if a document is delayed, it will be punished with a penalty of 60 penalties. If a military document is delayed, it will be punished with execution.
