A junk is an ancient Chinese sailing vessel/ship design still in use today. Junks were developed during the Song Dynasty (960-1279) and were used as seagoing vessels as early as the 2nd century CE. They evolved in the later dynasties, and were used throughout Asia for extensive ocean voyages. They were found, and in lesser numbers are still found, throughout South-East Asia and India, but primarily in China, perhaps most famously in Hong Kong. Found more broadly today is a growing number of modern recreational junk-rigged sailboats.
The term junk may be used to cover many kinds of boat—ocean-going, cargo-carrying, pleasure boats, live-aboards. They vary greatly in size and there are significant regional variations in the type of rig, however they all employ fully battened sails.