Second, the benefits of steel structure are considerable at present, especially the greater the production capacity and the higher the production level, the better the benefits (this is not nonsense). Of course, the company you mentioned should focus on steel structure installation, which is relatively poor, but it is precisely because of this that you have more room for development, such as deepening the knowledge of steel structure manufacturing. As for going to the head office, it depends on your ability and opportunity.
Third, whether the major you mentioned is appropriate, according to my years of construction experience, there is no question of whether it is appropriate. The specialty of mechanical design and automation itself is a panacea specialty under special conditions, and your own specialty has nothing to do with steel structure. For example, mechanical drawing, material mechanics, especially material mechanics, which you have studied, are all essential for the installation and construction of steel structures.
Fourth, as for the recruitment, it can only show that he doesn't know the steel structure major and what you have learned.
Hehe, have you thought about it?