Is the Gemu Education Agreement Class reliable?

The Gemu Education Protocol class did not follow the course, so the textbook knowledge was not sorted out, and the excellent trial video was not played. A few days later, the students are still practicing with their voices. Teachers don't have any textbooks, they don't understand them, and they don't talk about the key contents.

Gemu Education, established in Wuhan, Hubei Province, takes vocational education as the core and provides high-quality teaching services for examination, compilation, textual research and skill upgrading.