Events proved Duan Lingtian's guess to be entirely correct:
As the exquisite small pagoda flew over and began to expand, the old man's voice rang in Duan Lingtian's timely reminder, "This is the three-layered trial pagoda prepared by our Wuyin Academy for the ten-star student assessment... As long as you successfully pass the trial inside, you will become a ten-star student of our Wuyin Academy."
Wuyin Academy has different assessments for students of each star level.
Chapter 3595