The specific time for early registration still depends on the school regulations. Some schools can enter the school half an hour in advance, debug their own radios after entering, and sit until the exam begins.
In our school, it is played earlier, so students can sit in the examination room and so on, or recite the words of the exam outline outside the classroom.
Of course, if you are late, you can't take the exam, which will be counted as absence. The influence of missing the exam is still quite great. Due to the limited number of places in CET-4 and CET-6 in recent years, many schools have restricted the relevant provisions of the exam. Including but not limited to limited registration places, and if you register this time but don't take the exam, the school will limit your qualification for the next registration, which means you have to wait another year to take the CET-4 and CET-6.
In my opinion, if there are no other special reasons (such as illness, epidemic, etc. ), I still want to go, even if the level is not enough, to experience the test atmosphere and related problems of CET-4 and CET-6, and make the best use of it. Even if you really don't want to go, there is no need to sign up. Leave the opportunity to those students who need it.