Khanbaligh, China (Google Maps ⧉, OpenStreetMap ⧉)

"This canal extends for a distance of 40 days’ navigation from Khanbaligh to Khingsai and Zaitún, the ports frequented by the ships that come from India, and from the city of Machin (Canton)."

"In the same notice it is mentioned that “Zaitun is 30 days’ journey from Khanbaligh.”"