Both test sites are ok, there is not much difference. Just look at which side is near you, and the traffic is convenient!

Listening headphones are indeed issued by the Academy of Sciences, but Jiang Da wants to buy them himself (only 20 or 30 yuan). You can buy it online, and some people sell it there on the day of the examination room. Go to the examination room early, don't catch up with everyone to buy there, waste time and affect your mood ~ ~