See which city your home is close to, and go there to study.

For example, CGC national inspectors can train in Wuhan and Beijing, but after the final training, they still go to the test center in Beijing.

Our teacher went to Wuhan when he took the CGC exam, because he felt that the teachers in Wuhan were older than the young teachers and their study was relatively stable. But it depends on someone.

If you just want to open a shop and learn jewelry. I suggest you take the GIC exam. You can visit official website, Jewelry College of China Geo University. Some introductions may be helpful to you.

And they don't have to be trained in these two places. They are also very flexible. They set up training in Kunming, Shenzhen and other places. It seems that there are several different trainings every year. Go to school in Kunming, and then take the exam in Kunming. The teacher who came to teach was a teacher from Wuhan University.

But if you are not a student but a person who works outside, it seems that the tuition will be relatively expensive. It's like, I'm not sure about this.

Now it depends on whether you study gems or jade. Have the corresponding knowledge to teach.

I hope it helps you.