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Chapter 775 : Perfect Underground City! Be sure!
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Why is it so big?
You must know that each underground city has been dug more than 1,500 meters, or even more, and the area is super vast, basically half of the first-tier cities on the surface.
Is it half big?
It's too big.
Understand that human dungeons are basically stacked.
Layer by layer.
It's like a pyramid.
The further down, the larger the area.
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