You can go to this summer school by submitting the application form, and you don't need to be selected (or the school chooses you as a selection).
If you are active in summer school, you will receive an invitation to take the independent entrance examination in Tsinghua University around 1 1. You don't have to take up the places recommended by the school, and you don't have to prepare many awards to take the independent entrance examination, which saves you too much worry. Last year, our school went to seven and finally invited five, which is still very simple.
The summer school lasts for five days, during which I live in Tsinghua dormitory (you can choose to study for one day, but pay attention to the activity time at 6:30 at the earliest and 22:30 at the latest), and the schedule is similar to that of formal students in Tsinghua. The main content of the activity is to listen to several ace professors introduce their lectures and visit several laboratories.
Three exams, English, Mathematics and Science, were arranged in the activity. You can't beat those international students, so don't be nervous, just answer what you know. In other words, I don't know my exam results at that time.
In addition, team activities are more important, including basketball games and graduation performances. Please try to be positive.
In short, go with a relaxed attitude and don't bear any pressure. Summer school is mainly to understand and adapt to university study life, and talent selection is the second.
Speaking of my grades, I got an invitation letter, but I didn't accept it myself (I didn't write a composition), but I got 685 points in the college entrance examination and went anyway.