Your analysis is correct. Both are similar. Polymers may be more promising in the future. You can check the subjects to be studied in two departments, and then see where your personal interests are more inclined before making a decision. If both are similar, we can consider polymer as the first major and metal material as the second major. .

The strongest thing in Jingjiang should still be the car, because Jiang Da is good. . .

You should also consider schools in other places. Jiangda is the boss in Zhenjiang, but if it is in Nanjing, the learning atmosphere of the school will be different. For example, you can attend classes in other schools. . . . .

Jingjiang, you may not be as beautiful as you thought when you came. . . .

This is an experience. . . .