Hardly 'stolen' or 'knocked off'
How can anyone steal or knock off a design months ahead of Apples iCrap? The OS is different, the PCB is different, the functionality is different. In reality Apple copied these products that have been around since 2010 JAN.
Last week I received 2 tablets from Zenzhen and they were different to each other. Both had Chinese characters in their names (one also had RK2808 in the name).
I spent the weekend in Zenzhen and picked up 5 more tablets, all different in design and feature although there is commonality in components and some of the software. None had Android v2+ and therefore I would recommend those people not in SE Asia buy from a supplier within your country so you can get warranty service but ONLY after they load V2+.
Chinese products can be crappy from a reliability perspective. For myself it is simply crossing the border. That said the units I bought had mature PCB designs with zero mods, added components or jumpers. Software can be loaded through mini-USB connectors and external screens can be run from some tablets.
Even though Apple hit the market months after these units, it failed to add the many neat features these early bloomers had working 5 months early than Jobs did. You can actually use some of these tablets as a game controller playing on an external monitor. The Apple tablet is a missed opportunity - unless you want to sell annual 'upgrades' as has happened with the crippled IpHONE.
Manuals tend to be written in Chinglish, with poor illustrations. Three units have soft manuals loaded and further copies on the InterNet. Even schematics are shown. However, the unit operations are intuitive and my son has figured out the operation in under an hour.