As far as your question is concerned, Gao Wei's treatment for each position is different. Grassroots, mainly refers to the production line. Some posts will have three shifts, others will not, but there are more cases of overtime. If the monthly salary is piecework, there is a big difference between skilled workers and novices, generally between 1000-3000. Generally speaking, people pay for food, shelter and hardware.
As far as production technology is concerned, if you can mix with the squad leader (some are quite workshop directors), you will generally be unemployed and the salary is good.
That's about it. I hope I can help you. Good luck.