ahm, I understand the filesystem and partitions now.
the Chinese input method is from
http://hi.baidu.com/canbefound/blog/...93bc763c3.html
I had the root shell with USBNetwork before, but when the keys lost response, I've excuted this command: factory-reset. and now ,loose the shell.
if i copy firmware 3.1 and restart, it did nothing but delete the bin.
if i copy other bins like jailbreak/usbnetwork, etc, and restart, it says:update error 3.
i may have to use the serial console now. And I'm in China, maybe it's trouble to send it to Amazon.
Thank you very much.