This may depend on personal circumstances. If the self-study ability is ok, just read the textbook yourself. However, my personal experience is that the sea tactics are the most effective, one set of questions a day, try to simulate the real examination environment and methods, and choose real questions or good simulation questions. Anyway, that's how I got here. In addition, if it is the first interview, you can sign up for an interview simulation class to familiarize yourself with the process.