Yun Yong operates on Tuesdays and Fridays. Some vendors are ready for business at 5am and everything wraps up around noon, so get there early. A few vendors sell food (meat, fish and vegetables) and there are a few stalls selling old things. To call these old things antiques would be something of an overstatement. The term 'junk' is probably more accurate. You can also find the usual fake items (kong bplom) and even some plants