Qiuqiu told me that his name was Gu Mingxun, which was a very strange name, but the meaning was very obvious, it was to remind him to remember the lesson.

In this brief letter, he doesn't elaborate on what lessons are remembered, but I guess it has something to do with the Holocaust.

He said that he couldn't reveal much information to me and hoped I would understand, and finally he ended with an expression that is not very common in Chinese people, saying, 'Mom and Dad, I love you.' ’

Seeing this, I felt my nose sour, and I almost shed tears, and I could feel between the lines that he had something unspeakable.

He said that he automatically returned to the original world because of the end of the mission, and asked me not to worry about him, but he did not disclose the details of the mission.

But no matter what, as long as he leaves safely, it is better than anything else, and he is also afraid that I will be worried, so he specially left me a letter to explain.

I bet Ah Ying and the others must not have found out that he hid a mobile phone, and this letter must have been secretly written by him.

Returning to the camp with the prey, Ah Ying found that Qiuqiu was missing at the first time, she stared at the empty swaddling clothes and turned pale, I quickly explained, saying that Qiuqiu was fine, he had gone home.

At dinner, I announced to everyone that Qiuqiu had returned to his hometown, and everyone in the camp knew that Qiuqiu had suddenly disappeared, and I always had to explain to everyone.

I was a traverser, and only a few people knew, and even fewer knew the origin of Qiuqiu, so I said that I met his family outside the city, and they picked him up.

In fact, I could have taken this opportunity to tell the truth, but maybe it was the words that Ah Ying said today that affected me, and I subconsciously chose to tell the truth less.

Anyway, Qiuqiu's matter is over, and it doesn't matter if others know his true identity or not.

After dinner, I followed Gu Yu out to inspect, he and Bailichuan went around for an afternoon and did not find any loopholes in the defense, after eating he said that there was a guess, I accompanied him to see.

Gu Yu picked up the snow layer outside Guan Zhufeng's warehouse, scooped all the snow around the warehouse, and finally found a hole in the northwest direction.

In the afternoon, they only checked along the checkpoints on the outskirts of the camp, and found nothing unusual, and the cars used as the fence were well placed, and even the inside of the buildings and rooftops on the periphery.

Gu Yu squatted on the edge of the hole under the snow, which was actually the mouth of the sewer, and the manhole cover was moved to the snow layer next to it.

"Let's go down and have a look." Gu Yu looked down and said to me.

I jumped into the well with him, the ground was dry, and the cement pipes were thicker than I had expected to be, just enough for a man to get into.

"Use your antenna to measure how long it is." The space below was small, and the two of us had to be close to each other before we could stand, so Gu Yu couldn't turn or crouch.

I used an antenna to probe the inside of the drainage pipe, and measured it outwards along its inner space, and except for a few bifurcations in the middle, the total length is two kilometers.

After listening to the length I reported, Gu Yu nodded: "It just leads to the outside of the city, this is the key point we missed." ”

When we decided to build a camp in Gaishi, Gu Yu arranged for Bailichuan to weld all the sewers near the hospital, and the welding of manhole covers did not affect the use, and now it is not the rainy season, so the possibility of repairing the sewers is very small.

But when they chose a warehouse for Zhu Feng this morning, they forgot about the sewer, and Gu Yu suspected that the zombies besieging the school also came in from this sewer.

It's just that the sewer space is small, and people have to squirm forward when they get in, and it is delusional to point to it over thousands of troops, and it will take time to say it, but it would be okay if only a team of people came in to rescue their companions.

When we returned to the surface, Gu Yu immediately arranged for someone to weld all the wells in the city, which was a big project, but it had to be completed first.

On the way back to the hospital, we received a message from Bailichuan, who told us to go to the beach to have a look, saying that there was something new.

When we got to the beach, we didn't have to report to Bailichuan, and we found out what the problem was, the corpses piled up in the sea were gone.

Tens of thousands of corpses were piled up on the beach, and I didn't know much about the sea, so I asked, "Could it be that the sea will fall back into the sea after the high tide?" ”

Bailichuan shook his head and said, "You guys come and see this." ”

He led us to the sandbag bunker, where the tide would end and the sandbag would not pass it, so the empty shells that had fallen near the sandbag were still there.

But in the middle of the shells, there were piles of white, broken cotton wool.

"What is this? Zombie? I made a bold guess.

I thought that my wild guess would get a negative answer, but Bailichuan nodded and said, "That's right, to be precise, this is part of the internal organs of zombies." ”

I raised my eyebrows in surprise, it was impossible for the corpses that had decomposed to fly ash to leave the remnants of visceral tissue, and I was sure that the zombies that had flocked to the shore at that time were all gone.

So where do these visceral tissues come from?

"The sea rushed up?" Gu Yu asked.

Bai Lichuan nodded again: "Yes, behind those zombies killed by Sang Rou, there must be zombies." ”

Gu Yu then asked, "Did she come here after she left?" ”

Bailichuan said: "It should be, the corpse can float ashore with the high tide, it should have come in the afternoon, but I don't know why it became like this." ”

Gu Yu turned his head and looked at the calm sea, it was already dark at this moment, only the light of the sentry box on the shore illuminated the position where we stood, the sea was dark and dreary, and the moonlight and starlight were hidden in the thick clouds.

"I don't think they're going down that path anymore." After a moment, Gu Yu spoke.

The beach is the most important part of our defense, and it is also one of the most difficult areas to defend because there is sea water as a cover, so there is no way to detect it in advance.

Now that Gu Yu said this, Bailichuan should have breathed a sigh of relief, but he still asked with a puzzled face: "Why?" ”

Gu Yu said: "Our people didn't find them, they didn't attack them, and these internal organs don't look like they have been gnawed and torn by other animals, so there is only one possibility." ”

Bailichuan and I waited quietly for Gu Yu's next words, and Gu Yu paused and said, "This is a natural phenomenon. ”

Bai Lichuan became even more confused after hearing this, he frowned and asked, "What natural phenomenon can make internal organs escape?" ”

Gu Yu said: "Melt." ”

After Bai Lichuan listened, his eyebrows were raised, and Gu Yu did not explain further, leaving us time to think.

When I think of melting, the first thing that comes to my mind is ice, and along this line of thought, I associate ice with white zombies and compare what they have in common.

However, we don't know much about white zombies, only that they are intelligent and retain the memories before the mutation.

As for the physical aspect, I know that they can repair their wounds on their own when they encounter blood, but nothing else is clear.

Gu Yu squatted down and motioned for us to follow him to watch, and Bailichuan and I squatted next to him.

Gu Yu pointed to the white flocculent on the ground and said, "You see, there is no trace of rupture in the internal organs, but at least two-thirds of them are gone. ”

After being reminded by Gu Yu, Bailichuan suddenly said: "The disappeared part was not torn off by an external force, nor was it bitten off. ”

Under what circumstances will a whole internal organ disappear two-thirds and retain a third?

If there is no external force to destroy, it can only decompose by itself, that is, it will melt as Gu Yu said.

What's in the sea?

Since they haven't been attacked by other creatures, all that's left is seawater.

I remember that salt can melt ice, and I once did a small experiment with my classmates, and we only saw the internal organs floating ashore, and we didn't see the rest of the zombies, which just shows that Gu Yu's guess is probably right.

Suppose the bodies of white zombies have assimilated into the snow and ice, and they soak in the seawater, and their bodies will gradually melt, starting from the surface of the body.

After the zombies die, the corpses are pushed onto the beach by the tide, and by the time the tide recedes, they have been corroded to the point that only some of their internal organs remain.

"Whatever the principle is, we can try to take advantage of it." Gu Yu said.

Bailichuan immediately nodded and said, "Okay, it can just make up for our lack of hands!" ”

I didn't want to pour cold water on him, but when it came to camp safety, I could only say something, "Even if the sea water can melt the white zombies, in terms of time, it will take more than an hour." ”

If there is no jet lag, the white zombies will find that the sea water is fatal to them when they first enter the sea.

An hour is still faster, and it can take longer from the time they go to the sea to the time they swim to the beach area of Gaishi.

Gu Yu thought for a while and said, "Xiao Rou is right, but at least for the time being, we don't have to worry about them going by sea again." ”

Bailichuan originally lowered his head, but as soon as Gu Yu's voice fell, he suddenly straightened up, clapped his hands and said, "I have a way, we can use zombies outside the city for experiments!" ”

"Yes." Gu Yu and I said in unison.

If the sea water can really be used as a weapon, the problem of white zombies will be solved, and the number of white zombies will definitely not exceed the sea.

Bailichuan was recognized by us and left with an eager expression, I grabbed Gu Yu and wanted to talk to him alone.

He has the right to know the truth about Qiuqiu, so I handed the mobile phone left by Qiuqiu to Gu Yu, clicked on the document on the main interface, and asked him to read the content inside.

The content of the letter is very short, and you can read it in two or three eyes, but it is very informative and needs to be digested for a while.

"He said he came back on a mission?" After reading it, Gu Yu directly deleted the document, and the phone was restored to factory settings.

"That's right." The letter was clearly written, Gu Yu must have meant something else when he asked.

"I think we should be happy." Gu Yu smiled faintly, seemingly very pleased.

"Happy... Yes, at least we know that this world will still exist when Qiuqiu grows up. ”

Gu Yu shook his head lightly when he heard this, looked at me and said: "If it is an insignificant person, he doesn't have to come back deliberately, and he said that he is on a mission, then this task is probably not his decision alone, since this person must be saved, it means that her impact on the future must be beyond our imagination." ”

My mind turned around for a long time before I understood the meaning of Gu Yu's words, and said happily: "You mean, she is the hope of the future, and there is still hope in this world!" ”

Gu Yu held my hand, smiled and nodded.