Does Zhonggong Education in Zhaoqing provide power grid-related training?

You really have to ask the local area directly for this, just call for consultation.

My personal feeling is that training classes are generally not held for examinations like this that don’t recruit many people, or that don’t recruit many people relative to a region, because there are so few people!

It is recommended that you check the situation with training institutions in first-tier cities through the Internet.