I suggest you make good preparations for english interview, such as going to a famous school to attend a professional training class in Hong Kong or an oral class in New Oriental. As far as I know, 80% of the students we interviewed were prepared in advance or trained for a long time, so it was very advantageous when it came to English interviews.

The first round of interviews is usually a group of 5-7 people. After entering, everyone introduces themselves (the time ranges from 30s to 2m). After introducing yourself, the professor usually throws a question for your group to discuss freely. This time may be 10 minutes, and the professor will not participate. He thinks that when you have finished discussing, he will stop discussing, and maybe let one of you sum up all the speeches just now. Finally, the professor may give you free time to ask questions and let students ask the professor what they want to know. The whole interview is about 20m to half an hour.

If you are controversial in the first round of interview (the scores of two professors are too different, or one insists on recording and the other insists on not recording), or if you need to talk about scholarships because of your excellent grades, or if you are conservative but have a high score in the college entrance examination, the professor wants to give you more opportunities, then you have the opportunity to participate in the second round of interview.

The second interview is usually one-on-one, or many-on-one. In short, you have a chance to make a personal statement. There is no fixed form and time for the second interview. It all depends on your professor's interview and their purpose of inviting you to the second round.