When aliens visit the earth, people call the areas where aliens have stayed "visited areas", and those who enter the "visited areas" to search for high-tech items are called stalkers.
"Professor Wang, as a researcher at the Bureau of Extraterrestrial Civilization Investigation, what do you think of these high-tech items in the visiting area?"
"Just like humans go on roadside picnics on weekends and throw mineral water bottles, food packaging bags, mutton skewers and other garbage on the grass, aliens will also throw their garbage on the earth. Those high-tech items in the visiting area are just garbage in the eyes of aliens."
Earth: Yesterday you were indifferent to me, but tomorrow you will be out of reach.
