Chinas manufacturing is in decline as the people demand more money, they can see the outside world these days and they want a piece of it. There are several companies moving away from China now because it's becoming uneconomical to manufacture there. I think the hourly wage has gone from about 20c to closer to $1.20 in recent times.
Africa will become the new China, although probably ran by foreign powers. I know someone who has a factory in Kenya and they pay their workers about $40 a week for 14 hour days with half a day off a week. China can no longer offer such costs.
Now, the reason we are suspicious of this new handheld is because if it is indeed a new Dingoo it most probably won't have any of the tests or safety standards the Pandora (or any other handheld) has to have, it no doubt won't be registered with the usual bodies which we have to be with (for things like BT), it will may just ignore MP3 and Video codec licences (which we could never get away with) and as Ed mentioned they are questionable quality and seem to make no effort to improve this quality.
Also of course if this company is just pretending to make it, and they are actually just distributing it, it won't look good.
I really hope this company have designed the PCB and that Nub they are using, that they have developed with battery and charging system themselves, but my tech radar just tells me something else.