A local discounter offered a MP4-player entryx EM850 some time ago. The supplied firmware has some severe problems, e.g. the devices powers off while playing without touching it.
The TEAC firmware is brand new and thus fixes the problems of the entryx version. Since you can't download the firmware from the TEAC homepage, you have to get it from rapidshare.com.
All other files you can get directly from YIFANG: On the download page further down you'll find a EM850RB driver package which also contains the firmware-updater and drivers for the Rock-chip (both contained in the ConsumerUpdate inside the RAR archive). You have to unpack the ConsumerUpdate and install it.
Now do the following:
Consumer.exe(for English language, change the
.rfw) and click on Update
After the upgrade completed, you might have to format the internal storage for the player to recognize it.
Some little bonus: After the upgrade, you'll find a Tetris game as well as a FM-Tuner. But the latter one doesn't have any reception - maybe they didn't add an antenna, although the IC would support it.