Nursing graduates are interested in hospitals, but they are not sure whether they can get in. Is it necessary to go to the job fair?

I suggest that you must attend the job fair. Your intention is just talk, and you are not sure. Generally, a better unit will recruit 120% or more people, which means you can't know how many people you are in. If you are in the back, you will have to wait for the person in front before it is your turn. You got it? Intention is not binding on the unit or you.