Which industry does industrial robot belong to?

Industrial robots themselves belong to the mechanical industry and are widely used in many industries. There are three development directions of industrial robot and automation specialty, the first is industrial process control direction, the second is electrical engineering direction, and the third is embedded system direction. I just came out of school and worked as an apprentice in an enterprise with a salary of more than 2000. My classmate went to Guangdong to train for the Industrial Robot Training Institute for several months, and the salary was directly 6K, and some were tens of thousands.