Is it difficult for the major of mechanical design, manufacturing and automation to work in Shandong?

Your conditions are good. Now the company first looks at the hardware conditions, such as those certificates you mentioned. This is very important. In fact, those recruiting people are bullshit. I have experienced such a scene. Good grades are not the final condition. It will be tragic to understand tolerance and cooperation, especially the symbols appearing on engineering drawings, by relying on your own professional advice.