1. Sany Heavy Industry plans to specialize in infrastructure recruitment positions, which is different from your major. It is mainly to arrange the infrastructure plan, not the field work, but the design and laboratory work, so you can still work in the design institute in the future.
2. If you plan to specialize, the salary is 5000-6000. After 2-3 years, the salary of graduate students will definitely be more than 5000-6000, plus bonuses. After all, Sany Heavy Industry itself is still good, and it is recommended to do it.