Chen Yao smiled: "What is the situation in the mine?" Are there many remnants of civilization? ”

Brother Dao shook his head and said: "Not much, basically there are some first-level and two-level mine rats and mine spiders, we can solve it by dividing a group of people, just practice." ”

The blind bear added: "However, the ore on the periphery of this mine is not rich enough, and I have been looking for these sulfur mines for a long time, but if you go deep into the mine, the danger will definitely increase, so I will simply wait for the guns to be made before exploring the way." ”

Chen Yao nodded, "If you find saltpeter tomorrow, you can make guns, and everyone's combat effectiveness will be improved by then." ”

Everyone nodded, and the university monk hurriedly went off the assembly line first, saying that he was going to study the gun drawings.

He's going to have to turn around.

Brother Dao and Little Bear turned their heads to make up the contribution points, ran to the light curtain to change into a high-end helmet, and enjoyed the happiness of the next two hours.

Soon, players other than those who had murderous intentions went offline.

The Killer Sister looked at the sky before it was dark, and carefully proposed, "Lord Guardian, will you be free later?" Do you want us to go find saltpeter and explore the way? ”

Chen Yao also had this intention, "Let's go, explore for an hour and return." ”

"Mm-hmm, okay."

I don't know why, but when I think of being alone with the Guardian, I feel a sense of peace and security that I haven't felt in a long time.

————

In the woods, he carried two large bamboo baskets stacked on his back, walked in front to lead the way, and in his impression, the location where there was suspected precipitation of nitrate was near the location of the last time the rock salt was mined, where there was a small stream.

If you get saltpeter, you can make a gun!

On the way, Chen Yao vigilantly observed the surroundings, especially the eyes of these beasts around him, whether they were still blood-red.

Fortunately, it was approaching dusk at this time, and there were fewer beasts outside.

Half an hour later, the Killer Sister led Chen Yao out of the edge of the woods and directly saw the huge mountain range not far away

Chen Yao remembered that this mountain range was originally on the island, but after the island was upgraded, even higher peaks appeared behind the mountain range, and he didn't know what scenery was hidden inside.

Killing Sister pointed to the cave at the bottom of the mountain range and said, "Guardian, we found the rock salt in there before, and we found it all the way down the stream. ”

The creek is meandering, and along the way, you can see many animals coming to drink water, and there are many footprints.

Chen Yao nodded, and he pointed to the upper reaches of the creek and said, "Let's go up along the place where there are many animal footprints on the side of the creek, and be careful of the silt. ”

As soon as they walked a few dozen meters upstream, the two of them turned over a large rock, and immediately saw a large area of gray-white loose solid, which had different shapes and covered the surface of the rock, which looked like it was some years old.

Stepping on the stone, the killing sister looked left and right, and wondered: "Hey, why didn't I see the precipitation of nitrate there?" Did the university monk read it wrong? ”

Chen Yao was also watching carefully, remembering that when he was a child, the saltpeter in the farm toilet was precipitated from the outer layer of soil.

But there isn't one.

At this moment, a group of old friends, Archaeopteryx, flew from the nearby tree, still huge and obscuring the sky, staying in the sky above the gray-white solid from before, flapping their wings and flying down.

"Be careful."

Chen Yao pulled over the haystack next to him, shouting to the murderous sister to squat down together.

The Killer Sister said carefully: "Guardian, these birds don't fly to the creek below, why are they flying here?" ”

Before Chen Yao could say anything, a series of popping sounds came.

Chen Yao said helplessly: "Maybe they love to be clean, and they still run here for excretion." ”

The killer sister pursed her lips, "These bird droppings are the most hateful, they are difficult to wash when they fall on clothes, and if they don't pay attention to them when they fall on their school bags, they will be even more difficult to wash when they dry in a few days." ”

When Chen Yao heard the word guano, he was immediately inspired.

Wait a minute.

Since there is fresh guano, the solid on it should not be struvite stones, right?

Strounce is a good thing, and it can be used as fertilizer, and the associated nitrate can be used to refine nitrate, and there was a Three Kingdoms War in history that was fought for this thing, and the winner ate the dividends of thirty years.

After waiting for a while, the Archaeopteryx flock flapped its wings and left.

Chen Yao couldn't wait to flip his hand and jump up, picked a dry one, and kicked a piece hard to check the attributes.

【High-quality struvite and its associated nitrate】

[Uses: Fertilizers, industrial raw materials]

[Note: They have been accumulated here for a long time, and no one cares]

"It's really struvite, it's good."

Before she could understand it, she glanced at the attribute, "Strounce stone?" Is this dry bird droppings? It seems that Sister Soy is going to be happy. ”

Chen Yao said with a smile: "Everyone will be happy, there is no need to find the precipitated nitrate, dig up the soil under the struvite stone, and go back to boil it with the plant ash to get saltpeter." ”

Only then did the killing sister understand, and she stuck out her tongue in embarrassment.

The Guardian knows a lot.

But in the next second, she hurriedly stuck her tongue back in a panic, her little heart was beating wildly, and her face was hot.

"Shi Yingxue, Shi Yingxue, what's the situation? It's not like your style! ”

Chen Yao also noticed the little girl's mood change, he didn't speak, picked up the hoe and dug it up.

After a while, the killer sister also adjusted her mood and squatted down to put the scattered struvite stones in the bamboo basket.

The two of them moved quickly, and in a short time they were filled with struvite and nitrate in two large bamboo baskets.

Chen Yao looked at the physique of the killer sister, reassigned it, and used the bamboo strips to fill his basket with more.

It's a 40-minute walk back.

At this time, Chen Yao missed the storage compartment in the game very much.

The emotions are all the same, and the Killer Sister also thought of this, and she asked suspiciously, "Lord Guardian, have we ever had a space ring or storage space on our island?" It's the kind that you can put things in and take them away. ”

Chen Yao squatted down and carried the bamboo basket up, and said with a smile: "The Blue Star Civilization has not studied the mysteries of space yet, and when I travel to other civilizations in the future, I may be able to get similar treasures." ”

The Killer Sister nodded, she also squatted down and picked up the bamboo basket, and said as she walked, "Lord Guardian, how do you know the method of refining saltpeter?" Do you still practice alchemy? ”

Chen Yao smiled slightly, "The knowledge of civilization is interconnected, chemistry? Alchemy? The principles are all interoperable. ”

Killer Sister nodded, "Then will you build a nuclear bomb?" ”

Chen Yao: "........"

This loser kid, why are you asking this?

This question is obviously out of the outline.

He coughed, "There are all in the library, if you are interested, you can go in and learn to see, you have a merit in finding saltpeter this time, and you will be rewarded with 100 contribution points." ”

Hearing that there was another reward, the killer girl nodded happily, grabbed the side of the bamboo basket with both hands and carried the nitrate, and walked towards the safety zone one step from left to right.

Halfway through, it was getting dark.

At this moment, a miserable moo and heavy stampede sounded in the distance.

Following the sound, the originally dark sky suddenly floated a blood-red mist.

This blood red is exactly the same as the blood red in the eyes of those beasts before.

In just a few seconds, the blood-red mist outlined a symbol in the air that resembled a vertical willow leaf.

Like a bloody eye!

"What the hell is going on?"