Injection molding, SMT and CNC machine tuning are all better than others, that is, the general trade unions have a little bit of things, like driving, mining and repairing cars, which is the kind of proficiency. You know the procedure and precautions of surgery or treatment! A little training for ordinary workers is more than enough for three days to half a month! Being a mold and injection molding machine designer has a bright future! The technical content of mechanical adjustment is low, and the salary will not be higher than that of ordinary workers! In fact, many factories don't need masters or senior engineers. If you buy supporting equipment, someone can transfer the machine to deliver the goods. Engineers don't need it! Unless the big factory has a self-service R&D department! Many factories are the same as noodles and popcorn, and things are dull. Technicians have nothing to do but stare at the machine and observe the operators. If the doctor really confessed him, he would be fine.