This is the oldest world map that has been well preserved in one piece in China, dating back to 14th century, early Ming dynasty. Africa, Europe, Arabia are disproportionally represented in the west part of the map.
More details: See Da Ming Hun Yi Tu in wikipedia
P.S. I will be on a trip away for a week. The blogging progress has been significantly slowed down these days. I have so many unfinished drafts for the time being, and will definitely finish them after I get back.