"Damn it, are they going to detonate the rock layer right now?"
"That's right, the countdown has already started. There are at most ten minutes left. Our people are starting to struggle to hold on. They have already deployed all their troops!"
"Okay, I understand!"
Lu Yuan looked up at the distance above. He had only climbed about a few dozen meters so far, and there was still a long way to go before reaching the concrete layer above.
Now, Lu Yuan can only hope that once the rock layer collapses, the flood will not rush up too quickly, otherwise he will be trapped and die in this elevator shaft.
He still has a lot to do. In addition to climbing up to the concrete layer, he also needs to find the outermost edge of the elevator shaft above and climb up.
That edge is quite dangerous because it represents the location where the upper rock layer has collapsed.
Lu Yuan didn't know how far that place was from the concrete layer above his head, but he secretly guessed that the distance couldn't be short. He had to get through here in the shortest amount of time, so he really didn't have much time left.
After hanging up the phone, Lu Yuan gritted his teeth again and desperately climbed upwards, soon reaching the concrete layer.
Lu Yuan took out an iron hammer and smashed it hard twice on the concrete layer. He found that it was unusually thick and heavy. After a few more blows, the broken concrete fell down.
Inside, all you could see were densely packed steel bars, about the thickness of a thumb, and made of high-strength, high-toughness steel.
Without tools, it would be very difficult for Lu Yuan to remove these steel bars in a short time. And the concrete above the steel bars was of unknown thickness, so Lu Yuan had to abandon his plan.
"This path is blocked. It seems I have no choice but to look for a location on the edge. Hopefully, I'll have enough time!"
Lu Yuan steadied himself and shone the flashlight upwards.
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