Finally, the high level approved the application for using tactical nuclear bomb, and planned to use an air launched missile to hit a tactical nuclear bomb into the tunnel on Honghu Lake, and then use nuclear explosion to destroy all the tunnels in the whole lake area.

According to the calculation, the impact of the nuclear explosion will destroy most of the channels at the bottom of the lake. After the melting of the lake water, it will completely block the possible channels after cooling, which is enough to block the threat from the bottom of Honghu Lake in a short time.

Aliens want to invade again unless they can empty the bottom of Honghu Lake again.

At the same time, other areas have also found traces of alien invasion. According to the detected signs of alien activity, they have penetrated into the surrounding area of Dongting Lake, and the whole active area has covered more than half of the ancient yunmengze area.

Even in Xingcheng, the capital of Hunan Province, and three towns, the capital of Hubei Province, two important cities have found underground signs of alien biological activities, which has put the two places into a considerable degree of tension and preparedness.

In other cities in the Dongting Lake area, tunnels dug by underground alien creatures have been found one after another, and some cities have directly become new war zones.

Under such circumstances, the high level had to make a decision to let the troops withdraw.

"Let the troops retreat and let go of the line of defense?" Chen Xin didn't understand this and asked the general in the headquarters.

They have just received the decision of the high-level to withdraw the troops, which shocked Chen Xin greatly. He did not understand why the high-level should choose. The withdrawal of the troops undoubtedly means opening the way to the alien creatures and allowing them to drive straight into other surrounding cities, which will undoubtedly cause huge losses to the surrounding cities.

Although it is said that alien creatures have spread from the underground along the aquifer to the surrounding cities, this is still not the reason for Chen Xin to give up the existing defense line.

However, Chen Xin didn't understand it. As a commanding general, he saw it more thoroughly than he did. He explained to Chen Xin, "academician Chen, it's not that the country wants to give up, but that we have to retreat and readjust our defense line now."

As he spoke, the general drew out the map and pointed to the major cities around Dongting Lake, which had been marked red on the map. He said to Chen Xin helplessly: "these cities are important economic and industrial cities in Hunan and Hubei provinces around Dongting Lake. Once they were invaded by alien creatures, they suffered great losses!

When the state retreats its defense line, it is also to adjust its defense and focus on protecting these important big cities. Otherwise, if we lose these cities, not only will we lose a considerable part of our industrial production capacity, but also a large number of people will be affected, which will have a great impact on the country. "

After hearing the general's explanation, Chen Xin was able to understand it, but he still frowned and asked, "but once the defense line retreats, the range we need to defend will be expanded. With the current strength, we can't completely block these alien creatures, can we?

Once they cross the line of defense, they will expand quickly with the speed of these alien creatures. What can we do to prevent their invasion at that time? "

Chen Xin's worry is not unreasonable. Once the terrible breeding ability of alien creatures spreads, it will spread to other regions. At that time, it will not be one region that needs to be defended, but most regions of the country.

"The problem is that even if we continue to stick to the defense line, we can't completely block the expansion of alien creatures in this way." The general couldn't help but show a wry smile and pointed to the cities marked red on the map and said: "these cities are behind the defense line. It's reasonable to say that these cities can't be invaded when we block the positive invasion of alien creatures, but now we still detect the traces of alien biological activities.

Academician Chen, we don't want to withdraw now! But we have to withdraw. If we don't transfer the troops back, once the alien creatures break through these cities like Honghu, do you think we will put nuclear bombs in the city, or withdraw people to other places like this city? "

Chen Xin also felt helpless because of the general's words. At this time, he wanted to make a big killing weapon to kill all these alien creatures at once.

But the reality is that he can't.

Although he can build powerful bombs or other destructive weapons, once that kind of thing is used, can it completely kill all alien creatures? Let alone, the damage caused by it will be quite serious, and the consequences will be borne by human beings.

Chen Xin would not have chosen such an extreme way to solve the problem if he had not come to the end where there was no way.

Before things get to the worst, it's obvious that we can't use this way in any case, which may have huge sequelae.

But if it's any other way, Chen Xin has no clue, or can't ensure that he can kill all the alien creatures.

After all, the breeding speed of these alien creatures is too exaggerated, and they all hide underground. If we can't kill all the mothers and embryos once and for all, and eliminate the possibility of their continued breeding, we can't eliminate the threat of alien creatures.

This is no doubt unacceptable. After all, even if the vast majority of alien species can be wiped out in a short time, with their breeding speed, they will be on the same scale or even more exaggerated in three or two years.

Therefore, Chen Xin must ensure that the threat of alien life can be eradicated once and for all. Even if his population cannot be exterminated, his threat to human beings must be eliminated.

"If only there was a way to kill them all at one time. Now even if we throw nuclear bombs, we can't guarantee to kill them all." Chen Xin hammered the table very reluctantly. His face was gnashing his teeth. He hated his helplessness in this matter.

In this regard, the general could not comfort him. He only shook his head, called the staff on one side, and began to arrange the retreat of the defense line.

After all, it is the defense line around the whole Dongting Lake area. Where to withdraw, where to continue to stick to, where to withdraw first, where to withdraw later, and where to withdraw after withdrawal

All kinds of problems need to be coordinated and controlled by the general and the staff. There are so many things to do that there is no time to comfort Chen Xin.

And Chen Xin didn't need to be comforted. After a little venting, Chen Xin regained his spirits, left the headquarters and went to the biology research laboratory. Now he is eager to get the biologists' research data on alien creatures and find out the way to deal with them.

www.novelhall.com, the fastest update of the webnovel!