First and foremost, in the film, humans, like the audience, have their first encounter with extraterrestrial civilizations upon seeing their spaceships. In terms of appearance, these spacecraft are shaped like a paraboloid on one side and relatively flat on the other. The spacecraft adopt different postures when landing and taking off, and they are depicted as not only extremely large but also extremely fast. The characteristics of these spacecraft all reflect the highly advanced level of science and technology of this alien civilization, yet it also lays the foundation for the subsequent development of the film: What is the purpose of such a highly developed civilization in coming to Earth? But in reality, we have no knowledge of the specifics of the spacecraft, such as the material and structure. The author also has no intention to elaborate. On the one hand, it is not of great significance to the story; on the other hand, not presenting things too explicitly also helps to reflect the sense of oppression and mystery.