This I bought cheap a while ago. It is said that this kind of instrument goes as far back as 7000 years in China.
Mine is an 8-hole, 6 in front, 2 at the back. I would say mine is an E-flat Xun. The accurate fingering is hard to find online. I'm not even sure how standardized the fingerings are as there are so many different kinds out there. I may have to come up with my own fingering chart.