Cert works for 3 years [And, it will work forever by the date change trick].
Visit the thread it is mentioned in the guide.
On Top, you will see an English Option > "Register". Click on that.
Fill in the details while registering and revisit that thread.
Then, leave your application request on the last page like this:
IMEI > 012345678901234
Date > 01/04/08
NOTE: Its very important to check the date according to Chinese Time, NOT your local time. Just see the post above yours and verify the correct date.
Jot down your post number and keep checking Post #1 for when your number is published.
In the meantime, make 5 useful posts in any of the threads in the forum. It could be something like "Thanks for Post" or anything like that. You need 5 OP Points. Thats your goal. [Its written as: 金钱 5 OP币. Your goal is this]
When your number is announced on the 1st post, click on it. You will see a WinRAR File as an attachment. Download it. That contains your own .CER File for the IMEI you provided!
This .CER is the same as the one provided by Symbian Signed, so, enjoy!
Remember to post constructive comments while making 5 posts. Dont try and spam and post nonsense, remember, they are doing a great service to you.
Lastly, if you cannot get a meaning of a word, use Google Translate, its simply brilliant and can translate most of the text.
Google Translate can be accessed here:
http://translate.google.com/translate_t
Thats it. Good Luck to you.
The same tutorial with screenshots: [Thanks to miza]
http://www.usaupload.net/d/ozg47hpg7wa