This wasn't a chip for smart fridges. This was a surveillance masterpiece intended for the global supply chain. If this chip had gone into mass production—and if this firmware was the standard load—every device built with it would be a listening post.
Insert the MicroSD card into the powered-off Allwinner A50 device and turn it on. A red or green progress bar will appear on the screen as it flashes. Once the screen goes black, remove the card and boot the device normally. Troubleshooting Common Allwinner A50 Flashing Errors allwinner a50 firmware exclusive