"I have a question," Lin Xian said.
"Before, to find space-time particles, we had to use the Guizhou Sky Eye telescope, and it took so long to find them. Why can a simple detector locate them now?"
"Isn't the reason very simple?" Liu Feng responded nonchalantly.
"Is it easier to find a fish in the ocean or to track one that was just released into the water? Since we've already located that space-time particle, know its direction, its characteristics, and its properties, it's much easier to track down, of course."
"But still, the simple detector's power is too low. We have to wait for the space-time particle to be close enough to Earth to be detected. It has to be within a height of at least 2,000 kilometers. On the Earth scale, that is still quite close. After all, the distance to the moon is 380,000 kilometers, and my simple detector can only locate space-time particles within 2,000 kilometers."
