Koss Ranch.
On a patch of grass far from the cabin.
After hearing Qiao Na's words.
Ye Yuan could not help but reevaluate the woman before him.
She looked so delicate on the outside—how was she so violent inside?
However, Xu Hang had discussed the method she proposed with Ye Yuan before.
It was precisely because of this that Ye Yuan admired that underground lake even more.
"Impossible!
That place was built with C140 concrete.
There was no way explosives could blast it open."
Ye Yuan said with a wry smile.
"TNT—"
Qiao Na had been about to say that TNT should work.
But she immediately realized her mistake.
The explosive power of TNT could indeed destroy C140 concrete.
But the environmental conditions there had to be taken into account as well.
Indeed, in theory, enough TNT could blast through even the world's toughest C140 concrete.
But one must not forget that it was an underground river channel.
A large-scale explosion could very likely cause a geological collapse.
If that happened, the underground lake might be blasted open.
But those carrying out the operation would also risk being buried alive.
Qiao Na had not expected it.
That place had actually been constructed with C140 concrete.
This alone showed just how much importance the Kester Family placed on it.
They had considered even the smallest detail.
Perhaps many people did not understand the concept of C140 concrete.
But Qiao Na understood it very clearly.
C140 concrete was known as the hardest concrete in the world for a reason.
It could bear 15,000 tons per square meter.
What kind of concept was that?
It meant that if three thousand adult elephants were placed in an area of only one square meter.
It could still bear their weight intact.
That was rather astonishing,