The second is to study and work in China, and some go to companies to engage in technical research.
2. After graduating from physics, go abroad or go to graduate school, such as graduate school. Nowadays, materials and energy, of course, also engage in theory, such as theoretical physics, astronomy and so on.
If you change to engineering after graduation, you can study postgraduate, electronics, communication, materials, nuclear physics and so on. Of course, it is best to study for a graduate student in these fields first. You can also transfer to finance or economics. You have a good foundation in mathematics and physics, which is completely sufficient.