"Captain, satellite reconnaissance has made a discovery! The zombies were indeed near Yongxing Township and dug up the embankment along the Nenjiang River! In addition, the original river road was blocked, and now the river water is directly along Yongxing Township to the east, and the road has been changed! ”

Xu Kai's report verified Chen Yuan's guess that the zombies had not only blocked the river, but also diverted the river water to other places.

Everyone frowned, this is even more troublesome, even if the river channel blocked by the zombies is exploded again, the water volume of the Nenjiang River will be at least halved.

What's more, is the two-kilometer-long blockage of the river so easy to blow up? No matter how many shells there are, it will be impossible!

Because no matter how much you blow up, you can't blow up the dirt.

Theoretically, the fragments of the shells will add more mass to this place!

So Zhang Zeshan asked: "Fort Chief, is it necessary to continue shelling the zombie construction site now?" ”

Chen Yuan said affirmatively: "It is still necessary to do so, at least this can slow down the speed of the zombies filling the river." The weather is now that the temperature is likely to drop a little more every hour or even a minute every night. It's better for us! ”

Everyone nodded in agreement.

The weather in the Northeast is like this, and it only takes a few days to get cold. During these days, the temperature may decrease at every moment. The more the zombies move, the more restricted they are!

So the artillery units of the Iron Fort are also continuing to attack!

A large number of shells were constantly being sent out of the artillery positions of the Steel Fortress, and they kept falling on the construction site of the burial of the zombies in the Nenjiang River upstream. Blow up a lot of zombies under construction!

It is also impossible for the Corpse King to completely ignore the lives and deaths of ordinary zombies, and let them brave the artillery fire of human troops to rush to work.

Moreover, the bombardment of artillery shells is not completely ineffective in the loss of soil. At least a lot of the soil was blown away and fell into the unfilled river, where it was washed away by the surging water.

So today's Nenjiang River has become another Yellow River, and the sediment content in the water is as muddy as mud!

In this way, the speed of the zombies is naturally reduced. It used to take about half a meter to drop the water level, but now it takes about two or three hours to drop the water level by about half a meter.

No way, there are too many zombies. Even if the artillery bombardment of the self-rescue army is very intensive, it still can't completely stop the speed of the zombies filling the river!

In addition, when the zombies were constantly filling in the Nenjiang River, Chen Yuan and the others also found a headache.

In fact, this problem was discovered by the careful Wu Chaogui.

After watching the satellite surveillance video of the zombies burying the Nenjiang River in the upper reaches of the Nenjiang River, he asked suspiciously: "Do you feel strange!" Where did the earth and rocks used by the zombies to bury the Nenjiang River come from? I don't think they're digging up dirt from anywhere else, are they? ”

Indeed, the zombie army at this time did not dig any more dirt in other places except for the dug trenches.

And to fill the Nenjiang River, and it is a two-kilometer-long Nenjiang River Road, the amount of soil and stone needed is simply heavenly!

So where does all this dirt come from? Could it be that zombies can be created out of nothing, and they can't be conjured out of thin air?

Of course it can't be!

So this question immediately caught Chen Yuan's attention again!

Liu Jinlong guessed in surprise: "Could it be that the zombies are digging tunnels!" ”

Zhang Fatzi immediately agreed: "That's right, it must be, and only by digging tunnels can it be possible to have so many earth and rocks for nothing!" ”

Zhang Zhen asked suspiciously: "But why are they digging tunnels in a good way?" ”

Zhang Zeshan exclaimed: "Do you want to dig from the ground and attack us?" ”

"Won't it?" Zhang Fatzi said: "They are already cutting off the Nenjiang River, once the Nenjiang River is really cut off by them, then we will lose the moat, they can directly launch a fierce attack on us from the ground, why bother digging from the ground?" ”

Zhang explained: "Digging tunnels is not the same as digging trenches. Digging trenches can be dug by tens of thousands of people in a row at the same time, and digging is naturally fast. But digging a tunnel, the passage is so big, and there are only so many people digging at the same time, it is still very laborious to dig! ”

Jiang Wenli said: "Could it be to avoid the attack of the white phosphorus bomb?" Last night we used white phosphorus bombs against zombies, and the corpse king may have discovered the weakness of white phosphorus bombs, as long as there are obstacles, the killing effect is almost '0'! So I thought of using tunnels to hide soldiers and dodge the attacks of our white phosphorus bombs! ”

Liu Weitao agreed: "It is possible that zombies can control a large number of zombies at the same time, and they will definitely be able to quickly analyze the way to dodge the attack of white phosphorus bombs from zombies who have not been hit by white phosphorus bombs." ”

Many nodded in agreement.

But Chen Yuan thought for a while and said, "I think it's possible to do both!" We do not rule out the possibility that zombies will attack us from underground. At least as time permits, I think it's entirely possible! Anyway, for the Corpse King, this can't waste much of its troops, and it also needs soil to fill the Nenjiang River, it's just a matter of taking advantage of the trend! So the underground part should also be guarded against! ”

Liu Jinlong nodded and said, "Yes!" The point is that the fortifications in the underground part of our Steel Fortress, although it is currently ahead of schedule, is still not completely repaired, only a third. If the zombies dig in the right direction, there is still a good chance that they will dig under the Iron Castle! ”

The so-called underground fortification of the Iron Castle is actually a project that wants to wrap the entire underground of the Steel Castle like half an eggshell with a large amount of reinforced concrete.

It's a huge and difficult undertaking. It has been implemented since a year and a half ago.

The construction team needed to dig a quarter-arc hole along the outer wall of the Iron Castle one by one, and then erect steel bars and fill it with concrete, and finally wrap the entire underground part of the Steel Fortress in a reinforced concrete eggshell up to 4 meters thick!

Because of the fear of causing landslides, it can only be carried out in such a short section, and the progress of the project is very slow.

But once this project is completed, the security of the Steel Castle will definitely be greatly improved!

It is estimated that it is difficult to dig through the 4-meter-thick reinforced concrete wall with the crude iron weapons of zombies.

But now! Just like Liu Jinlong said, the project has not yet been completed.

About two-thirds of the area has not yet been wrapped in reinforced concrete! Once the zombies are dug up, they can easily break through from the ground into the Iron Castle.

And at this time, in the shelter under the Iron Castle, hundreds of thousands of refugees are still hiding inside!

Once invaded from underground by zombies! The consequences will be unpredictable!

(End of chapter)