materials? What material? It's not very clear. In my concept, there are two kinds of materials, one is technical and the other is biased. If you are engaged in technology, you will probably be assigned to the technical department, pipeline team, ventilation team and so on. The undergraduate students in this department have just entered about 21~25, and the specialty is about 16~2. There is also a kind of literary materials, generally ministry of materials and equipment, or documents, etc. ministry of materials and equipment's salary is almost the same as the above, and the documents will be four or five hundred lower. The working place is in an office building, or it may be a container on site; Food is not included, but there will be a monthly food allowance, ranging from 15 to 3, depending on the project department. Environment, remote areas, what do you think?