I wrote this down when I went to the exam last time. Try it, it should be right. But now they may have a holiday and no one is on duty.

You just need to bring your ID card and money to sign up. There will be a teacher to guide you how to do it and fill in some personal information. Finally, you'd better spend 10 yuan to buy an exam guide book and CD-ROM from them. Studying at home will be beneficial.

Wish you success! Come on!