Yuan Dynasty Relay System

Timeline

1. 1311–1313Yuan Dadu · ChinaAfter Emperor Renzong of Yuan acceded in 1311, the center transmitted edicts and military intelligence to the provinces through the jam system, with overland relays from Dadu to the circuits maintaining regular horse changes and food and lodging.
2. 1315–1317Karakorum post road · Mongolian PlateauThe northwestern and steppe post roads continued the Mongol-era horse-changing system, with envoys and merchants traveling at fixed station intervals, sustaining the Yuan court's transport links to the northern steppe and the Western Regions.
3. 1320Jiangnan express courier stations · East ChinaAround 1320, the Jiangnan express courier stations worked in concert with overland jam relays and waterborne grain transport, forming a diversified nationwide transport and communication system that supported the administration of the late Yuan Empire.