Are all college students from state-owned coal mines?

Not all of them. The coal mining industry of state-owned enterprises is to mine coal resources in rich coal mining areas. At the time of recruitment, it is required to have a university degree in mining, a junior college degree or above in mining, but not all workers who are proficient in the coal industry are college students. State-owned coal mines are an important part of China's coal industry, occupying a considerable market share.