Answer: The reasons for Tsinghua Ban Qiu to apply for the exam are as follows: 1. Ordinary senior high school senior three graduates and senior two students who meet the registration requirements for the unified college entrance examination in 2022. Second, I love the country and the party, advocate science, have good physical and mental health, have excellent grades, have outstanding innovation potential and are interested in mathematical research, and have mathematical potential and expertise during high school. These are the reasons for Ban Qiu's application.