You can change your major after going to college! Generally speaking, it is at the beginning of the second semester of freshman or the first semester of sophomore. If you want to change your major, you must get good grades, especially math! You are a sophomore, so it is probably more difficult to transfer, and it is probably easier to transfer from science to liberal arts. I just majored in mathematics, which is very difficult. The scope of employment in the future is very small. The way to do well is to take the postgraduate entrance examination, which is even more difficult. Hey! I advise you to think it over carefully!