Nothing ~ I practice every day. You can ask the PE teacher. That's how I got the exam. The PE teacher helped me to watch the time and urged me to practice. I was much slower than you at first. But now running 800 meters outside Hangzhou has made a lot of progress ~ Come on! Hard work will definitely work, physical examination is not that important, just pass the customs. Take it easy. I hope to see you on the campus outside Hangzhou in the future ~