Looks like there is a Dahon handlepost and main frame hinge on it, so it was likely built in the Chinese Dahon factory, an OEM bike. Many of these around for on-sellers to put their own labels on. Yeah is one of the better-known ones. A Dahon in many respects but usually loaded with the cheapest componentry. My Yeah started out like that, but now sports XT gears and a Schlumpf bottom bracket.