Chapter 27 The Sky and the Ground

After a big battle, the courtyard was in a mess.

The ground was full of potholes, including "large pits" made by Xiao Jian digging soil and stones, and fist-sized pits the size of a washbasin formed by giant zombies.

There was a lot of soil and twisted iron barriers scattered on the ground, like some unknown postmodern artworks.

Sharp broken iron pipe fragments were scattered all over the ground, like the iron caltrops used to defend against people and horses in ancient times - that is, the kind of hidden weapon with four spikes always pointing upwards, which is roughly equivalent to the modern police tire puncture device.

Fortunately, these sharp fragments are not so sharp that it is difficult to pierce thick-soled sneakers, otherwise Xiao Jian's soles would suffer.

And farther away, Xiao Jian worked hard for many days to build the breast wall.

The front battlefield of the entire courtyard is 12 meters wide, and the breast wall is naturally the same width.

It may not seem like a big deal, but you have to know that the lanes on the road are about 3 meters wide.

12 meters is equivalent to 4 lanes.

After being ravaged by giant zombies, this "four-lane" wide front battlefield has become uneven and full of gaps except for a few sporadic breastworks.

Like an old lady with all her teeth falling out...

What Xiao Jian wants to do is to delay the opponent's attack and prolong the number of rounds of battle to give him more time to output.

As long as the front battlefield is not completely blocked, monsters will get in if there is a little gap.

As long as a monster gets in, it can be said that Xiao Jian's life has begun to count down.

Rather than waiting until the last moment to knock down the monster, the best way is of course to keep the enemy out of the country.

How can we defend it?

If the entrance to the front battlefield is not 12 meters wide, but 1 meter, it will be easy to deal with - just build a 1-meter thick heavy iron wall, even giant zombies will find it difficult to get in.

But the problem is not that simple.

The defense area, defense strength and resource card consumption are an impossible triangle.

The larger the defense area, the lower the strength of the defense building. And if the defense strength is also to be improved, a lot of resource cards will be consumed.

The zombies Xiao Jian faced were getting stronger and stronger, and the short breastwork was still effective in defending against ordinary zombies, but now its performance was obviously outdated.

Not only the breastwork made of iron piles and stones, but also the cheap and affordable iron barricades that only consumed one resource card to seal the entire front battlefield, it was time to withdraw from the stage of history.

While thinking, Xiao Jian refreshed the "Holy Book" casually, and saw another person who wanted to exchange gold for "God-given Heroic Spirit" on it, and couldn't help but smile bitterly.

The refresh of the "Holy Book" was too random... It would be strange if the transaction efficiency could be high!

No wonder the tribe didn't get any servants until it was destroyed. It was purely killed by the refresh mechanism of this "Holy Book".

After brushing several times without seeing what he wanted, Xiao Jian looked towards the gate again.

It turns out that the iron reinforcement method is still very useful, which is why most modern buildings use reinforced concrete.

But the problem is that Xiao Jian can't buy cement.

I definitely wouldn't consider exchanging it with resource cards. After all, cement is a deeply processed industrial product, not a single substance. If I exchange it directly with resource cards, the quantity is very small, and it would be the most difficult to build a breastwork of five or six meters.

So Xiao Jian concluded that cement is far less cheap and labor-saving than iron chevaux de frise.

Otherwise, upgrade the material?

Xiao Jian took a look at the exchange rates of various alloys. The good news is that whether it is stainless steel, titanium alloy or even tungsten carbide, the exchange rates are exactly the same.

The bad news is that the exchange rate is too low. An ordinary-sized titanium alloy chevaux de frise requires 30 resource cards.

Like cement, the exchange rate of deeply processed materials such as titanium alloy is greatly discounted.

So after thinking about it, Xiao Jian's cheapest and most practical materials are actually just stone and soil!

"Tsk, if I could exchange it for cement..."

Xiao Jian couldn't help but refresh the "Holy Book" again, and the result was still a demand to exchange valuable items for "God-given Heroic Spirit".

So far, after refreshing so many times, Xiao Jian has roughly classified these demands.

Most of them are looking to buy "God-given Heroic Spirits", and a small part is a variety of food.

The rest is still a large part of weapons trading, and then there are some messy, normal or abnormal niche needs.

As for building materials? I have never seen them once.

Maybe it's because the value of these things is too low, or maybe they think no one will lack such things...

"...Ah."

Xiao Jian sighed and stood up from the side of the "Holy Scripture".

In the narrow sky surrounded by the fog wall, the night sky is deep blue and the moonlight is beautiful.

But there are no stars or clouds in the sky.

If Xiao Jian has not seen the repetition of heaven and earth and the rotation of the sun and the moon, he may think that the clouds in the sky have fallen to the ground and turned into fog.

But now he even has some doubts, the sky outside the patio... is it really the sky?

For this question, Xiao Jian just touched on it and didn't dare to think deeply.

If you have to go to extremes when you encounter a problem that cannot be solved, you will soon collapse.

So the first priority now is to solve the problem.

"Hmm..."

Xiao Jian couldn't help but look at the [Windmill Clover] he just got.

Tomorrow, go to the three-story office building to see if there is anything else that can be used?

Or use it to exchange for building materials such as cement?

Anyway, this kind of servant can only be used once after being summoned. Compared with the cards such as pepper incendiary bombs or temptation mushrooms that either clear the field or control the field, the windmill clover seems to be of little use.

Compared with the office building adventure that is destined to yield little, Xiao Jian thinks more and more that it is more cost-effective to exchange it for cement.

Thinking of this, Xiao Jian did it.

He directly put the [Windmill Clover] into the card slot on the left page of the "Holy Book" and set the exchange requirement of "10 cubic meters of cement".

10 cubic meters of cement is about 30 tons. Xiao Jian remembered that an uncle in their village built a two-story new house and used 25 tons, so he felt that 30 tons was enough, and there was no place to pile more.

The night is still long.

Xiao Jian got up, strolled around the small courtyard, and tidied up a little.

During this time, he also went to the location of the previous "ancient tomb" to take a look.

Since it got dark, the tombstone of the "ancient tomb" disappeared.

When the tombstone disappeared, the "ancient tomb" also disappeared...

There was no tomb chamber, no stone steps, only an ordinary pit, and traces of zombie gravediggers digging with their hands could even be seen on the pit wall.

As Xiao Jian had guessed before, the tombstone was a necessary condition for the existence of the "ancient tomb". When the energy on the tombstone was exhausted, the "ancient tomb" would naturally disappear.

After a circle, Xiao Jian returned to the plants and lay down.

He didn't know if there would be new attacks tonight, but he still had to sleep, otherwise he would not have the energy to work tomorrow.

It was another night with the sky as a blanket and the ground as a bed.

Uncomfortable...