Can someone tell me if there is an examination room in Jiangmen, Guangdong Province?

I don't quite understand your question.

You haven't signed up for the self-taught exam, have you? If your home is in Jiangmen, and you apply for the Japanese undergraduate self-study exam. Jiangmen must have an examination room and will arrange exams.

In other words, no matter what the situation is.

Jiangmen youkaochang