metalboy,
I too want to get access to mydigit.cn and posted a reply to the thread here:
Welcome to bbs.mydigit.cn.
Unfortunately I can't read Chinese and even though I use Google Translator, hit a stumbling block during the registration process. I can't seem to get the invitation code and even though it leads to a site to pay for the code, I can't read what it says because it's all in Chinese.
If anyone can help with the registration process, that would be great.