In short, we can sneak in.
Dong. Dong.
Both of them were quite agile, successfully jumping through the cracks in the floor to reach the basement.
From the moment they jumped down, the sound of "doo doo doo" became significantly clearer.
"See, I told you, it's clearly not the sound of crying."
The man laughed:
"Doo—doo doo doo—just as you said, it's a kind of mechanical alarm or fault sound. Since this is a research facility, it's not surprising that some equipment continues to work. At least...a machine can work for a hundred years, which is much more realistic than a person crying continuously for a hundred years."
"The only thing I don't understand is, this place is obviously in a complete power outage, with no external power supply. How was the power supply maintained for a hundred years?"
"Miniature Nuclear Battery."
CC replied without hesitation:
