Job fairs in Beijing: National Exhibition, National Exhibition, ganjiakou and Agricultural Exhibition, which is better in quality?

I said that the national exhibition and the agricultural exhibition should be good, and it is meaningless not to go to the others. I didn't go, but I heard. Although I have been in Beijing for two months and have been looking for a job, I have never been to the recruitment site. I vote online. I went to the Lama Temple to find out the situation. I know this job fair is hopeless. On second thought, I think it should be all units in Beijing. First, there are so many universities and famous schools in Beijing. Second, Beijing is more of a political center. I will also go to the agricultural exhibition tomorrow. Do you know the cost there? We can communicate more. I will leave a QQ with 3 15 1 15048.