Yong-le: Year 3, Month 9, Day 2
24 Sep 1405
As the number of envoys from the various overseas fan coming to Court to offer tribute was increasing, the Emperor ordered that in each of the maritime trade supervisorates of Fu-jian, Zhe-jiang and Guang-dong, there be set up government postal relay stations to serve as hostels for them. The Fu-jian Postal Relay Station was called "Lai-yuan" ("Receiving Those from Afar"), the Zhe-jiang Postal Relay Station was called "An-yuan" ("Soothing Those from Afar") and the Guang-dong Postal Relay Station was called "Huai-yuan" ("Caring for Those from Afar"). At each post, one position of station officer was established.
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 10, page 709