After returning to his residence, Fang Hao and the two of them had a full meal, in addition to instant noodles and ham sausages, he opened a can of canned fish to celebrate today's abundant harvest.

In addition to the crystal nuclei that were used to buy the crossbow blueprints, he now has fifty or sixty crystal nuclei in his hand, and he only keeps ten, and the rest are all absorbed into energy by the system.

With this energy, he can recharge the return scroll at any time, and if there is danger, he can return to the original world in an instant.

However, this cannot be used lightly, because returning to the scroll is not a panacea, and when the energy in the scroll is used up, he will have to be forcibly sent back to his original place, and if an enemy or zombie crouches on the side, he still can't escape.

But at least this is also a life-saving means, which can temporarily solve the predicament, so Fang Hao has to ensure that there are at least a few hundred points of energy in the system.

Tonight, Zitong ate very happily, and was very full and satisfied.

After eating, Zitong asked Fang Hao: "Brother Hao, will I be able to eat these every day in the future?" Can you eat enough every day? These two days I feel like I'm dreaming, have I come to heaven? Otherwise, where else would there be such a delicious thing? ”

Fang Hao smiled: "You're right, this is heaven, do you know?" There was also an emperor in heaven who hoeed grass in the fields every day, and the hoes he used were all made of gold. ”

Zitong was puzzled: "What is so rare about gold?" Also, what do you do with hoeing? ”

At this time, Fang Hao felt that it was necessary to comprehensively and systematically learn from Zitong about many things in this world that he did not understand.

For example, why don't people here farm.

"Farming? How? Is it planted in the wild? When the tide of corpses comes, will the crops survive in the crowds? Also, even if the zombies don't come, planting a little bit of crop is not enough for people to rob. However, I have heard that very large human settlements will grow very few crops in them, and they will be guarded by heavy soldiers every day, how many people can afford to eat food? ”

Fang Hao smiled bitterly: "Okay, okay, I'm a bit brain-dead when I ask this, in order to avoid this situation from happening again, if I don't understand anything, I can only make up for it myself." ”

"What is brain supplement?"

"Okay, okay, I don't have a common language with you, that, about the various situations here, you can tell me anything, anything."

Zitong hurriedly said: "Great, I think so too, you don't know, I eat too much and go to bed immediately, I feel very uncomfortable, sometimes there is a sound of "dangdangdang" in my ears, I don't know where it came from, I look outside, there don't seem to be zombies......"

Fang Hao stopped her: "Don't talk about this, just talk about all kinds of things in zombie and human settlements, it's okay to say what you know, and it's okay to listen to what others say." ”

Zitong spoke very obediently: "Zombies, haven't you seen zombies?" Ordinary zombies are like that, but in addition to ordinary zombies, there are more powerful ......"

Zitong spoke, Fang Hao listened, and occasionally asked a word or two, Zitong talked until almost midnight, Fang Hao saw that she was a little tired, so he asked her to rest.

After Zitong fell asleep, Fang Hao went into the underground cave he had dug again, added wood to the furnace, and continued to refine cast iron, and after refining some of the cast iron, he began to make iron arrowheads.

On the other side, he made another campfire, put the iron pot on it, and began to make candles and torches. Candles are made of animal fat and grass fibers, and torches are made of animal fat and wood, both of which require animal fat.

Today, when he peeled pheasants and hares, he harvested a lot of animal fat, which was not of much use, so he made some lighting tools.

In addition, there are dozens of pieces of raw meat, all of which he puts in the storage box in case he needs it.

As soon as he had made dozens of iron arrowheads, he used them to make crossbow arrows.

Iron crossbow arrows are more penetrating and more damaging, although Fang Hao's archery skills are not high, he is also confident that with a maximum of two crossbow arrows, he can kill a zombie, if he shoots accurately, there is no problem with one zombie with one arrow.

Because it was too late, Fang Hao didn't go down to mine, after he put some wood in the furnace, he let it smelt cast iron and make iron arrowheads by itself, and he himself climbed out of the hole and slept until dawn.

The next morning, Fang Hao began to renovate the fortifications again, and last night he heard a lot of things about the corpse tide, and he also had more ideas about the transformation of the fortifications.

Zombies are faster and more aggressive during the corpse tide, and some zombies also have the ability to climb walls, which can climb to the top of the wall and destroy the roof, so Fang Hao also has to take defensive measures on the roof.

As for the glass windows, they are of no use at all for the almost paper-like existence of zombies.

So Fang Hao didn't even bother to eat after getting up, he first smashed all the windows upstairs and downstairs, and then filled all these windows with a wooden frame, and then started to upgrade.

The durability of the wooden frame is only 50, it is increased to 100 after upgrading, and it can be increased to 200 after upgrading again, if you continue to upgrade, you need to use pig iron, pig iron is upgraded for the first time, just nail a layer of iron sheet on the surface, the durability is 250, and then you can wrap all the iron sheets on the surface, the durability is instantly increased to 1000, and the iron sheet can be upgraded again for the last time, it is still 1000, and then it is concrete, and finally it is forged steel, and finally its durability will be as high as 20000.

This durability is a protective layer, knocking off the forged steel, the concrete will be exposed, the concrete will be removed, the pig iron will be exposed, and finally the wood.

At the moment, Hao didn't even have enough pig iron, let alone concrete and forged steel, so he could only upgrade the wooden frame twice with wood.

After sealing the entire house, Fang Hao felt that the room was too stuffy, so he cut off a few more wooden frames and made a few wooden bevels to install them. The wooden bevel is triangular, just half of the wooden frame, put this on, it can not only be transparent, but also block zombies from getting in, although it is not very good-looking, but safety first, so I can't care so much.

Then, Fang Hao made some floor thorns, came to the roof, and put the ground thorns horizontally on the top of the outer wall, which could effectively block the wall-climbing zombies from entering the roof.

In the end, Fang Hao upgraded the innermost layer of spires on the outside of the house to increase their strength.

Looking at their temporary stronghold now, they look like hedgehogs, covered in spikes.

"What's the matter, do you think this place now, when the corpse tide comes, can we hold it?" Fang Hao asked for Zitong's opinion.

Zitong sighed: "There are so many wooden thorns, when the corpse tide comes, even if we don't do it, they may not be able to attack it." ”

"Possibly?" Fang Hao hurriedly asked, "You mean to say that there are still areas for improvement?" ”

"I didn't mean that, I mean, if there was a place in the yard to shoot arrows, and if the zombies did come in, we could shoot them, that would be great."

Fang Hao observed the courtyard, except for a small path specially set aside, the courtyard was already full of ground thorns, if he found a place to shoot arrows, it would only be a high place.

He suddenly remembered his method of using the wooden frame to torture the zombies, and as soon as he had an idea, he installed several steps with a wooden frame on the inside of the courtyard wall, leaning against the wall, and the highest step was two meters higher than the courtyard wall.

If the zombie tide comes, they can jump down the ladder to the top, and then knock off the wooden frame that is used as a ladder below, and the zombies can't jump up if they want to, only to be beaten.