Grade point = score/10-5, credit grade point = credit * grade point = credit * (score/10-5) (more than 90 points are calculated as 90 points). Average GPA: (course credits 1 * GPA+ course credits 2 * GPA+ course credits n* GPA)/ (course credits 1+ course credits 2+ course credits n).
This mainly depends on the requirements of the colleges and majors you apply for. Generally, English and specialized courses are required. You can contact the school where you are studying, as well as the seniors of the school, to find out about the situation and forms of the undergraduates in the last year or the school, because the tutors of master students usually take the undergraduates in the school, and you can also get some information from them. Generally, schools are ranked according to your total score, so this involves which subjects to calculate. First, professional core courses are necessary, followed by professional development and professional elective courses (depending on the school), which should also be counted as the results of public general courses. Generally speaking, don't relax from freshman year, and try to get high marks in subjects.