What professionals do coal mines need to recruit?

Mainly the professionals corresponding to each coal mine. For example, if there is a shortage of electromechanical talents in coal mines, they will recruit electromechanical professionals.

Now the coal mine is in recession for a short time, but it won't last long. As far as majors are concerned, mining and ventilation safety are relatively easy to find jobs now, and coal mines also need majors, followed by electromechanical majors.