Hi all, after contacting Amazon.cn, I had gave up on this device (and got a Nexus 7 2013...). But yesterday I came across a forum thread that asked about kindle repairing, and I realized that I can try 3rd party repairing.
So I searched taobao.com (the ebay-like C2C site in China), and found a local guy who did this as a part time job. Today I went to his home and handed the device to him, and I was surprised how easily he tore the front panel off, just like turning over a book page. But he did not let me into his house to have a look on how he tinkered with the bricked Kindle.
After an hour of waiting, he came out with my kindle revived, I thought one hour is too long for such repair operation, but anyway he had stuck the front panel back and it looks like brand new, and he charged me only 50 Yuan (about 8 dollars), so I am happy with it now.
(Even the subway and taxi fares to there cost me 20 Yuan, and this did not cover the return trip).
@knc1: Thanks for the link, the images and teardown video are great, while the serial communication stuff gets me overwhelmed, thankfully there is some proficient guy to help me with that and now I can focus on my reading on Kindle instead of Nexus tablet.
