When reading books, there are always many questions to ask, or many questions to test us. For example, do you know that time can be static? Do you know the name of the kindest alien? Do you know that the light from aliens can cure diseases? Is there an edge in the universe? Do you know how many planets there are in the universe? How far does the light go every second? I was really baffled by him for many questions. When I asked him the answer, he told me that he was like a teacher.