The ETS registration number is a one-time examination number (which can be understood as a one-time admission ticket number) and will be assigned to candidates after they successfully register (grab the examination quota). The allocation of this number is made immediately after registration, but sometimes there is a delay (up to 10 days before the exam). At the time of registration, it must be confirmed that candidates have both NEEA ID cards and ETS ID cards. If there is only NEEA ID card but no ETS ID card, candidates can't sign up anyway. You need to wait several hours to several days to register ETS ID. Without ETS ID, candidates don't need to refresh their web pages unnecessarily.
For more information about TOEFL, I recommend to choose Midland English. The strategic cooperation between American English and National Geographic Learning (NGL) has developed a series of teaching materials with real cases and scenes, and TED Talks has provided some speech training and wonderful materials. At the same time, the textbook of Macmillan, an internationally renowned publishing house, is selected as the textbook of advanced English language and speech class, and professional guidance and intimate service are provided throughout the students' learning process. Free English listening class