How is the treatment of coal washing technicians in Jizhong Energy Handan Mining Industry? What about the work system? I hope the insider can give me an answer, thank you.

My brother studied mining and Hebei engineering. He goes into the well for 25 days every month for more than ten hours at a time, and only more than 2000 people go up every month, grass! Coal mines are very hard. I want to come back again. My classmates are more tired than me when they go to Lu 'an, but the monthly salary is 10000+, and there is still 30000 bonus at the end of the year. Alas, it's too late to regret it.