Not difficult. Line up, it's your turn, and then the judges and teachers will each send out a paper. Then you can briefly talk about the main idea of the paper: research significance, research background, research methods, research results, other problems encountered in the research, etc. You don't have to read the whole article and then the teacher asks questions. The questions are mostly about the research background, research significance and research methods of your thesis. It depends on whether you can handle it. If someone asks you where you are not ready, the teacher will give you advice. Just accept it with an open mind and don't try to be brave.