Super Real Academy of Immortality

Huajie, a modern world of immortality that was rectified by Emperor Li Tiandi's predecessors as time travelers, advocated "vigorously introducing immortal cultivation talents" and "everyone has immortality cultivation". Zhang Yifan was pulled to the transformation world together with other dead people from various periods, and was arranged to enter the No. 1 Immortal Cultivation Academy in Xianfeng Mountain to study immortality. I understand the truth, but what does it mean that you have to complete a fixed number of credits every semester, otherwise you will repeat the grade? What does it mean to be able to work as a lecturer in various schools after graduation? Is it serious that if you want to go back and obtain the level of a Celestial Immortal, you will have to draw numbers to go to other worlds after cultivating to Celestial Immortality?