When the survivors of Peach Blossom Land gathered around to observe the prey with curious eyes, everyone noticed the nearly five-centimeter-long sharp claws and sharp teeth on the animal's corpse, and couldn't help but feel scared. Fortunately, these guys rushed in at supper time, and just happened to be discovered by Wang, which gave Wu Han time to prepare. If they sneak in quietly after everyone fell asleep, the scene... was really chilling when they imagined it. Sun Meng happily hugged the Tu Gou Wang who had made great contributions and kissed him hard, which made the puppy very impatient and shouted in a slight voice to protest. The others present were not in such a good mood.

While the survivors looked at each other, Wu Han took the initiative to speak and said:

"It's obvious that we have no choice. We will not sleep tonight, and we will do our best to seal the hole first. Otherwise... can you really sleep soundly at night?"

The welding machines, steel plates, rebars, wire mesh and other equipment materials used in the door sealing project are currently available in the cave. This is not surprising. If it weren't for this matter tonight, who would have known that a place that has lived in a very stable place would have to be built? The materials and equipment needed must be made time and effort from the warehouse on the Nanfeng side. It is also a heavy manual labor to drag these dead things in the narrow and cramped tunnel.

After several consecutive moves, Wu Han was exhausted and out of breath, and the sweat beads as big as beans fell. Even if he relied on his good health, he could hold on to those women who didn’t even have calluses on his hands. I’m afraid he would not have any results in ten days or half a month.

In view of the urgent security situation, the survivors of Peach Blossom Land had to give up their power to rest, and everyone prepared materials and equipment overnight.

After the current preparations were ready, Wu Han volunteered to stand up as a construction worker. He made a circle of small holes along the rock wall with a drill rig, and after fixing the bolts, everyone worked together to erect the wire mesh one by one, and then welded the edges of the wire mesh to one piece. These tasks were simple, but in fact the project volume was quite large. It took more than ten hours to weld the first wire mesh fifteen meters away from the hole platform.

Everything is difficult at the beginning. After finding the technical key points, you can copy the work later. Move the first wire mesh 80 cm inward and start to set up a second wire mesh. However, these two layers of hollow wire mesh look very thin in the cold wind. I guess a pair of vises can easily handle this simple line of defense. No one knows which Wu Han sings now.

Soon, Wu Han solved the answer by himself, and he greeted everyone and said:

"Xiaoya, Zhao Yuan and Yunyun, you three are responsible for watering these two layers of wire mesh with water pipes. Master Kong, you should rest first. The other people are in groups of three, and everyone changes shifts every ten minutes. Be sure to spray the water evenly. Wait until the water in front freezes, and continue to spray water on it. Be sure to pay attention not to leave bubbles. Everyone understands it, right?"

Outside the cave at this moment, the cold weather in nuclear winter is still increasing. Under this low temperature comparable to the polar regions, many things that seem incredible on weekdays will become reality.

Ice, a solid water that leaves a fragile texture on weekdays, has a hardness of beyond imagination at low temperatures. It is said that during World War II, the polar bears used ice as road construction material to temporarily build a road to transport supplies to Leningrad, which was besieged by heavy troops. Of course, the Hans in the siege were very unwilling to give up, and as a result, they bombed with large-caliber cannons for several weeks, but they only blasted some small potholes on the road surface of the ice road. The maintenance personnel of the polar bear only had to secretly pour some water at night, and then freeze it, and the road surface was restored the next day. The result of this competition was that the Hans had spent countless ammunition and failed to destroy this simple ice road, which shows the magic of nature.

The ice wall that closed the entrance of the observation deck was about 130 cm thick after completion. If the ice layer was frozen strong enough, it would be said that it could not be shaken by human power, even the strength of the bear would not be damaged at all. Therefore, using ice as building materials to build a defense line during the nuclear winter period can be considered a good deal with good quality and low price.

Time passed day by day, and amid the gaze and suspicion of the survivors, a crystal clear ice wall was already standing near the entrance of the tunnel leading to the observation deck.

The construction period of the ice wall took about five days and was built purely by manual watering. The transparency of the ice surface is very high. Even when people stand inside and look out through a wall of more than one meter thick, their eyes will not feel restricted. Below the ice wall, a thick iron door is placed, and the outside side of the door is welded with many rebars of one foot long. The front ends of these cut-off steel bars are cut and polished to a sharp edge of forty-five degrees. There is no doubt that no one or animal, as long as they pounce on this hedgehog-like door, the end of the situation will be immediately the possibility of becoming a hornet's nest.

Although Wu Han admitted that the wall looks good and its light transmittance even reminds people of the famous Northern Ice Lights, no one dared to make a decision. It is useless to have a beautiful appearance. The ice wall is ultimately a defensive facility, and whether it is strong or not is the most important issue.

"Bang!Bang!Bang!"

In order to accept the quality of the project, Wu Han took the initiative to swing the eight-pound masonry hammer that had been prepared, and then he used all his strength to smash the big iron hammer firmly on the ice wall.

When the hammer fell heavily, a loud noise followed. The cave was full of rumbling echoes, and everyone present showed painful expressions and couldn't help but reach out to cover their ears. Only Wu Han had tasted the pain of the cave echoes early and blocked the ear holes with a large ball of degreased cotton in advance. At this time, he quietly took out his ear plugs and put them in his pocket. He approached the ice wall and calmed down. Wu Han's face immediately showed a long-lost smile. The position on the ice wall that had just been smashed with a large hammer was only a white spot as big as a ping-pong ball. A slight damage of this level was naturally a negligible problem for this ice wall with a thickness of more than one meter.

Wu Han touched the white dot on the ice wall with a serious expression. After confirming that there was no hidden wound on the ice wall, he nodded happily and said:

"Well, it's good, it's good, the quality is excellent. This time everyone can rest assured to sleep soundly."

After saying that, when Wu Han turned around, he found that several viewers had disappeared. At the moment of his confusion, several women mysteriously brought a large paper bag and handed it to Wu Han's hand. They weighed the paper bag in their hands with suspicion. Wu Han looked at them and said:

"What's this?"

"...I want to praise your heroic performance. I tried it many times before I made this dress. Is it suitable?"
Chapter completed!