Su He, who often conducts field investigations, is no stranger to how to get clean water, but he just wants to see Du Yunfei's ability.

"What are you going to do? I'll listen to you all. ”

Du Yunfei thought for a while: "Let's go back to the dock first." ”

The walk was too slow, so the bike I just found came in handy.

Du Yunfei rode a bicycle, and Su He, who insisted on sticking to him, sat in the back seat. Maybe he couldn't find the feeling in his hands, Du Yunfei stepped crookedly a few times when he started, Su He landed on the ground with both feet, and his hands also hugged Du Yunfei's waist tightly and didn't dare to let go.

Fortunately, the speed came up and the car was stable. Bikes follow the road towards the sea. There was a cool breeze along the way, and the air was still filled with the fragrance of the camphor tree and the mutated smiling flower.

Su He kept hugging Du Yunfei's waist and didn't let go, and unconsciously put his face on Du Yunfei's back. He could feel Du Yunfei's body stiffen slightly, which suddenly made him feel better, and his hands were more energetic.

Not long after, I heard Du Yunfei protest: "Let go." ”

"Don't let go, you bite me!"

“…… It's too dark here, so you don't want to fall to your death and turn on the lights. ”

Hearing Du Yunfei say this, Su He took out one hand and turned on the flashlight.

Artificial light dispelled the darkness in front of him, but the night still lingered on both sides of the road. The tall trees cast mottled on the colored steel wall, like ghostly shadows.

Su He was still clinging to Du Yunfei's back: "You're not afraid?" ”

Du Yunfei's answer came directly from the resonant chest: "The night is not terrible. ”

"Who asked you this. The world has become the way it is, and you have never felt afraid? ”

Du Yunfei was silent for a moment, but still replied: "Personally, I have experienced something more terrible than this. ”

Although Du Yunfei didn't say any more, Su He was already able to guess the answer.

He let go of the arm that was bound to Du Yunfei's waist, and his palm gently slid against the man's waist. Soon found a gap and poked into Du Yunfei's shirt.

When the palm touches the broad back, you can feel the muscles stirring slightly. Su He slowly moved upward, and the touch of his fingertips quickly became complicated.

Shallow bumps and folds cover almost the entire back. When you actually touch these scars, it is more shocking than what your eyes look like.

Su He felt it, and he was secretly surprised in his heart.

It stands to reason that this kind of ugly scar should not be touched, even if he looks at it more, he will feel uncomfortable. However, at this moment, his palm seemed to be sucked in, not only was he reluctant to lift it, but there was even a stream of hot air running up his arm.

The bike had reached the periphery of the aromatic plant area, and as it passed the barbed wire gate, it jolted slightly. Su He subconsciously reached out to grab something, but his palm slid from Du Yunfei's back to his front.

With a screeching braking sound, the bike came to a halt in the dark windbreak. Du Yun grabbed Su He's hand violently and looked back at him.

The woods are unusually quiet. They were close enough to hear each other's breathing.

The hand was grabbed and couldn't move, and Su He was forced to cling to Du Yunfei's body. He simply raised his head and smiled defiantly at Du Yunfei, and dropped a kiss on the man's shoulder blades.

The crisp and exaggerated kisses were clear in the night, but even louder was the crash of the bicycle falling.

Du Yunfei grabbed Su He and got out of the car, and the two of them were almost entangled, barely walking a few steps before crashing into the casuarina tree on the side of the road.

The flashlight on Su He's hand had long since fallen. He was laughing silently with his mouth open.

The reason why he couldn't make a sound was because Du Yunfei bit his throat like a wolf, and his teeth were fierce.

Su He didn't put up any resistance, allowing Du Yunfei to push himself against the rough tree. There was a little pain in my back, but it hurt so much that it blended in with the pain in my throat.

Du Yunfei's barbaric biting continued, as if he wanted to vent all his dissatisfaction and helplessness with Su He during this period of time. Bite into Suhe's flesh and suck his pheromone-scented blood.

But soon, a new wave of dissatisfaction began to surface. Biting is not enough, far from enough, Du Yunfei realized in a trance that he should do something else.

Torture Su He fiercely, tearing apart the sleek and cunning mask on his face.

There must be, behind that hateful expression of ease, there must be another Su He, those slender eyes that will lose their minds; The thin lips will become flushed and moist; That beautiful face will be wet with tears, and it will show a gorgeous expression that no one has ever seen......

Once the long-suppressed evil fire is ignited, there is no possibility of being extinguished in a hurry.

However, just when Du Yunfei was about to go out and let go of himself, Su He suddenly screamed close to his ear-

"Ah!!!h

Du Yunfei was startled, and the cold sweat was released, and there was no evil fire in an instant. He hurriedly let go of Su He, and just as he wanted to ask what was going on, he looked down and saw the culprit.

A duck that came out of nowhere was angrily pecking at Su He's feet.

Du Yunfei picked up the flashlight that fell aside, only to find that there was a duck nest under the casuarina tree. It was only two steps away from where they were entangled and biting.

"I'll go, how can there be ducks in this hellish place?!"

The frightened Su He took two steps and fled to the middle of the road, looking back at the fat flat-haired beast.

"It's supposed to be a sea duck." Du Yunfei is also well-informed, "This kind of duck is raised in many coastal mangrove forests in the south and used to lay eggs. ”

After relieving for a long time, Su He barely took back half of his soul. He wiped his neck, and then a strange smile appeared on his face.

"And are you still biting me?"

“……”

Du Yunfei's evil fire had long been extinguished, so he picked up the bicycle and walked forward.

The two of them finally returned to the docks. There are always a few pieces of charcoal in the ashes left behind after cooking rice and lighting a fire these days. Du Yunfei had already collected them all in advance, and at this moment, the two of them took the charcoal bag and prepared to return the same way.

Su He also wanted to jump into the back seat of the car, but Du Yunfei pushed the whole bicycle over.

"You ride."

Say ride, ride. The two of them finally returned to the villa without incident. Before dinner, the two of them continued to squat at the door and ponder about the water purification.

The key to water purification is to remove the three substances that are mixed in the water - chemical pollution, solid residues, and bacteria and viruses.

The artificial lake of Foguang Island was formed in ancient quarrying mines, which has been inaccessible for hundreds of years, and the vegetation around the lake is luxuriant, and chemical pollution can be basically eliminated. Most bacteria and viruses can be killed by boiling them. Then the main problem is how to remove impurities from the water.

Du Yunfei found a piece of cloth to plug the fine opening of the water bucket, dug a shallow pit and put the bucket upside down on the ground, and then sawed off the bottom of the bucket with a hand saw.

According to his instructions, Su He took out a white cotton dress from the large pile of women's clothes, cut a large piece of fabric about the same cross-section as the bucket, and then sewed the activated carbon masks one by one onto the fabric with a simple stitch method to ensure that there were no gaps between the masks and the masks.

The simple activated carbon filter layer was quickly completed, and Du Yunfei placed it on top of the bucket closest to the water outlet.

The second layer is the ordinary charcoal layer. They crushed all the charcoal they collected from the campfire and spread it evenly and thickly on the surface of the activated carbon layer.

On top of the charcoal layer, fine sand, coarse sand, and large and small stones are added in turn as different filter layers. Each layer is about five centimeters thick. The final product looks a lot like a large cake with multiple layers.

"Wait a minute, there's one more layer." Su He said suddenly, "For a period of time after the eruption, it rained acid. Both lake and sea water have a tendency to acidify, and it is best to neutralize it before drinking. ”

As he spoke, he turned his head and walked outside the villa, and came back with a large bundle of lycoris flowers that had been cut in the past two days.

"Adding another layer of plant ash on top should work."

The two of them found an open place and lit a fire, and the ashes of the lycoris flowers were collected and placed on the last layer of the bucket. A simple but effective water purification device is thus complete.

With the assistance of Su He, Du Yunfei made a round hole in the bottom of the cut bucket that matched the diameter of the water pipe, and then reinstalled the bottom of the bucket with the hole, and carefully wrapped it with waterproof tape.

In this way, as long as the water pipes are laid, they can be installed.

Around this time, dinner was ready, and everyone gathered in the hall on the right side of the first floor.

Thanks to the canteen on the construction site, the pots and pans for this meal are complete, and the meals are all well cooked. Everyone sat in clusters of new chairs, brightly lit overhead, and cleanly furnished, as if they were a weekend dinner for a group of friends. After the night, everyone will return to their respective posts and continue to live according to the rules.

However, this normal picture is an illusion, because the whole world has fallen into madness.

Looking at the green and shiny greens in the bowl, Lin Youqing sighed first.

"I don't know how long I can last like this."

"It's not a few years." Lu Rulan also shook her head, "Although there is water and electricity now, if the parts are damaged and not replaced, they will soon be scrapped." The six of us simply don't have the ability to produce such a sophisticated instrument. ”

"Maybe the zombies will die after a while." Duan Whale hypothesizes, "Since it is a living thing, it must have a life cycle, and a perpetual motion machine does not exist at all." ”

Du Yunfei agrees: "As long as science and technology education is passed on, even if every infrastructure is destroyed, there will always be a day when civilization will be rebuilt." ”

Haichen took two mouthfuls of rice and also interjected a sentence: "Xiaolan and Youqing should mean that they are worried that without water and electricity, our lives will return to the primitive and become the same as barbarians." ”

"I don't agree with that." Su He took two puffs of fans, "There is no water or electricity in the Tang Dynasty, but many people dream of going back." What's wrong with no water and no electricity? People are people, and if you want to live a good life, the key is here and here—" He said, nodding vigorously and in his head and chest.

"Wisdom and courage?"

"Stupid, of course it's Yan and Chest!"

"Brother!"

Lu Rulan suddenly squinted her eyes and stared at Su Hemeng: "...... What's wrong with your neck? ”

Su He touched his neck and glanced at Du Yunfei beside him with his spare eyes.

Du Yunfei pretended not to know anything and calmly took a sip of tea.

In this case, Su He also pretended to be indifferent: "It's nothing, I was bitten by a hungry wolf passing by." ”

The adults showed expressions of sudden realization. Only Duan Xingze's children took the case.

"Brother Suhe is lying again, how can there be wolves on the island!"

Lu Rulan covered her mouth that almost sprayed rice with a "poof", Haichen choked and coughed desperately, and even Lin Youqing couldn't help but lower his head.

Only Su Yiyi looked at Duan Whale seriously: "Your son knows too much." ”

President Duan calmly sandwiched the peanuts: "Don't ruin my son's beautiful childhood." ”

The dinner lasted for almost an hour. At about eight o'clock in the evening, everyone packed up the dishes and chopsticks, left the well-fed and well-fed Ah Dog to guard the door, and put some small dried fish outside the house as a salary for Ah Mao, and then got on the engineering truck and returned to the beach.

Back on the docks, it's still a little early to go to bed. Haichen didn't know where to find the poker and said that he wanted to fight the landlord, Duan Whale shook his head first, and said You play first, I have something to talk about with Lin Youqing.

With that, he pulled the man out of the boat.