If you want to learn, go to the additive exchange meeting organized by various additive companies; Mainstream manufacturers will go;

Call Runbide, Wei Zhen Chemical and other agents to consult the meeting time. But this is usually an internal meeting, see if you have any channels to go. In a word, there is no free lunch. If you really want to learn, you can stay in a production enterprise for two years, from product development to application, and you can really enter the industry after you finish learning.