Introduction: You had taken up the class of Student.You had now reached lv.7.Acquired skills: elementary school knowledge, middle school knowledge, and high school knowledge.You took the university entrance exam.You got a full score on the exam.Your basic class was upgraded to lv.9, and you activated the class-change system.You became a scientist and gained R&D skills.You used R&D skills and gained space fortress-building technology.You used R&D skills and gained starship technology.You were now invincible....