Specialized courses depend on your major. Some professional industry leaders have published industry guides, which stipulate the learning content and learning channels of professional courses, so you have to learn according to what he says.
If there is no major that publishes industry guides, it can be arranged by the unit. Generally, the number of hours reported in one day is no more than 6, and those less than one day are reported by hours.
In addition, an individual who publishes a paper in a periodical at or above the provincial level can count as 18 class hours, various studies, seminars, enterprise practice, etc. Can be declared as a professional course.
Elective courses are negotiated by the unit and the individual, that is, the unit can arrange it by itself. If the unit does not arrange it, the individual can also choose to study online.