Dear judges and audience, Today, as the opposing party, I would like to explain the pros and cons of middle school students using mobile phones. As a modern communication technology, mobile phones have not only changed our payment methods and entertainment methods, but also provided many conveniences for students. For example, mobile phones could provide students with learning materials and entertainment resources at any time and anywhere, so that students could learn more efficiently. At the same time, mobile phones could also provide social opportunities for students to expand their horizons and improve their overall quality. However, there were also some negative effects of using a mobile phone. First of all, using the phone for too long could easily lead to eye fatigue, cervical vertebra disease, and other problems. Middle school students are still in the growth and development period, and their organs are not fully developed yet. Long-term use of mobile phones will have an irreversible impact on their health. Secondly, excessive use of mobile phones would affect the quality of students 'sleep, resulting in poor mental state and affecting their academic performance. Lastly, excessive use of mobile phones could distract students from their studies. To sum up, there were both pros and cons to the use of mobile phones by middle school students. We should enjoy the convenience of mobile phones while also bearing the negative effects. As a judge, I believe that we should give middle school students a reasonable amount of time to use their phones so that they can use their phones to improve their academic performance and protect their health.