There is a gap between the number of people who enter the second interview and the number of people who are finally admitted, but it is not much. This is because schools generally adopt differentiated admission and will choose those with better comprehensive scores. But the policy changes every year, and you need to check the latest news to be sure.

Login to official website/Hohai University Graduate School, you can find the admission list and the second interview list, and then compare them to get the gap this year.