Can I take the postgraduate entrance examination after the job fair in the university has been decided?

Yes, there is no conflict between the two. Postgraduate entrance examination was held in January, and most campus job fairs were held years ago. There are more job fairs on campus and more good institutions. Personally, I suggest you think about your real choice first, and it is best not to blindly follow suit. The best way is to try to attend several job fairs first and see the situation. If there is no job you want to do, you can prepare for the postgraduate entrance examination with peace of mind. Looking for a job at the job fair is still a waste of time.