Is the joint entrance examination of Weinan institutions generally limited to freshmen?

No, the entrance examination is for the recruitment of social groups.

Fresh graduates can also participate, depending on the application requirements on the job list, and how to choose five types of applications also depends on the requirements on the job list. Because some positions have professional requirements, you can only report your major, and then see which category to prepare according to.

Recommend official website for Chinese public education. You can find announcements and job lists over the years, guidance and analysis for preparing for exams, recommended books and so on.