Chinese Junk Vessel

Junk is a generic term used for ancient Chinese vessels. Junk vessels were widely used to transport people and goods at sea, rivers and lakes in ancient China. The name derives from Jong, which the Spanish translated to Junco.
Unlike Western vessels, Junk vessels have no keel, and had 2 or 3 layers of sheathing. Oil or lime was applied to surface to avoid water from seeping.
The simple construction of mast and sail allowed for easy lowering of the sail in case of storm or strong wind. Junk vessels were far advanced compared to other vessels of the same era.
The vessels were further advances during the Song Dynasty, and were used to travel far as India and Arabia for trade.