Dude has been in this business for ten years, and the adjustment of injection molding machine is a technology. It's not difficult to say difficult, but it's so difficult to say. Of course, all kinds of technology industries should be like this. Just out of school, be modest and rush to the last sentence on the title. You still need to go to school for two years. If you can't be a man, don't talk about doing things. Graduation from junior college is no longer an honor.