```
"It's just unbelievable," Curator Zhu said, looking at the bright ceiling. He certainly knew that many rocks in nature can glow, such as fluorite, which emits fluorescence when heated or rubbed.
But he had never heard of rocks that could light up a place as if it were daylight.
Of course, everyone was very clear about one thing: many ancient civilizations each had their own characteristics and brilliance, many of which even surpassed the standards of this era, leaving even scientists baffled.
If people could perform cranial surgery thousands of years ago, what's so surprising about a glowing rock?
"The founder of this city must really have something to do with Zhang Menglong!"
Suddenly, everyone realized this fact. Only someone who was extremely familiar with the city could know it so well that they could find the "light switch" with a flick of the hand—wasn't this their own home?