"Lao Li, this is fierce fire oil! Branches and grass ropes are dipped in some and used for torch lighting, which is especially good. When you meet a jackal on a night walk, this torch burns fiercely, and it can also be used to drive away jackals! We have to take this with us when we go into the mountains to collect medicine. Fei Junyi explained.

Yesterday they dredged the canal together, and they had already become familiar with each other and exchanged names.

These two medicine picking boys, one is called Qi Xiaoer, and the other is Fei Junyi.

And the two of them, like Lao Zhang before, call Li Chengfei Lao Li.

Even sometimes shouted Lao Li Tou when he was in the air.

"Fierce Fire Oil...... Petroleum? ”

Li Chengfei's eyes lit up, he strode over, took it and looked at it, and became more and more sure.

"Oil? I have never heard of this name, but some people call it Shiqi, and that mountain is called Shiqi Mountain. If you say it's oil, it's pretty apt, because it's coming out of the cracks in the rocks. Qi Xiaoer smiled and said.

"Out of the cracks in the stones? Hahaha! Li Chengfei also smiled, "I didn't expect that there was oil here, it's easy to do." ”

Oil is not only used as an energy source, but also as a very important industrial raw material.

Li Chengfei's Nan Ke has more than 170 simulated memories stored in his brain, which itself is equivalent to a science and technology tree, with oil, he can do a lot of things.

For example, the trouble in the medicine field in front of you can be easily solved.

Soon, he smiled bitterly again - when the other protagonists arrived in the fairy world, they were all busy cultivating immortals and competing for all kinds of secret medicines, only he was looking for oil here, trying to find a way to weed and be a good medicine boy.

That's the real thing! Thoroughly!

"Little Brother Qi, Little Brother Fei, is there any gas that can burn in the place where the fierce fire oil comes out?" Li Chengfei asked.

"Huh? Lao Li, have you also been to Shiqi Mountain? The qi there can indeed be lit. Qi Xiaoer sighed softly.

"I haven't been, but I've heard of it. Two little brothers, can you trouble you and find a way to get me some of that kind of gas that can burn? And this fierce fire oil, get me some too...... I don't let the two of you work hard in vain, I give silver. ”

The transactions between mortals in the fairy world are mainly gold and silver.

Burning coins is so precious that most of them are used by immortals.

"Lao Li, it's too polite for you to say that. That thing just came out of the mountains, and it wasn't worth much. Lao Li, if you want, we will take you there tomorrow. What do you want that to do, though? Although that gas can burn, it is poisonous. Birds and beasts often pass by in the mountains, and they are poisoned. Brother Qi kindly reminded.

"I understand, thank you for your kind reminder. I just want some gas that can burn. However, I can't leave the medicine field because I'm busy with farm work these days, so I'm bothered to get some for me. You must take the money, or I will always use your help, and I will not be able to go. Moreover, it costs you money to get some animal skin bags for gas. ”

Li Chengfei said, turned around and went into the house, and came out with a few pieces of broken silver.

"That's a bit too much!" Neither of them reached out to pick it up.

Li Chengfei stuffed them directly.

"If you don't take it, I won't be able to ask you for help in the future."

The amount of silver he gave was not too much, but a little more within reason.

When he was shopping in the town and at the Immortal Sect grocery store, he had seen the prices here. With Nan Ke here, as long as you glance at it, you can write it all down.

He calculated that the two little brothers would be busy for a day's wages, plus animal skin bags, etc...... Give those few pieces of broken silver, which can only be said to be a reasonable price.

It's not a good thing to give too much.

"Alright, we'll get it for you tomorrow." The two little brothers took the money, chatted a few more words, and left.

"It's good now."

Li Chengfei suddenly relaxed.

"There are many methods of weeding and insecticide in modern agriculture, and pesticides may not necessarily be used. Flamethrows are very effective in weeding and insecticide. ”

Just now, when he saw the fierce oil torches of the two little brothers, he had a flash of inspiration between the lightning and flint, and thought of flamespray weeding.

This method was used by Lao Mei before he crossed the country, the big tractor pulled the flamethrower, a row of dozens of sprinklers, the flames spewed out can reach a high temperature of 2,000 degrees, and instantly enter ten centimeters deep underground, killing the grass roots, insects, and eggs.

At the same time, the directional fire will not damage the seedlings.

This can be there!

Li Chengfei brought his flamethrower.

This is for the military, but it is also suitable for adjusting the size of the firepower and using it to weed.

Whew-

The flames erupted, the weeds quickly withered, and all kinds of insects were burned to death before they even had a chance to escape.

The flames sprayed on the ground, and as you can imagine, the eggs were also killed.

This is faster than catching insects by hand, I don't know how many times faster.

"In this way, the eggs are also killed, and there will be fewer and fewer insects in the future, and my work will become more and more idle."

Li Chengfei is happy.

……

"Huh? This mortal is quite interesting! ”

Li Chengfei was busy weeding with a flamethrow, and on a large rock on a hillside a few miles away, an old man with gray hair and a thin body was sitting there.

His legs were spread like a dustpan, and there was a wine gourd next to him, and a few drops of wine were stained on his messy beard, and his eyes were a little foggy from drunkenness.

At this time, he was raising his eyelids to look at Li Chengfei.

The distance of several miles did not seem to affect his vision in the slightest.

The so-called large array of the nursing courtyard that could be used for a certain amount of shelter did not work for him at all.

He just watched Li Chengfei busy tossing, drinking wine, and when he was tired of it, he looked at the small river under his feet.

As if there was nothing worth taking to heart.

……

In the evening of the next day, the two little brothers drove the ox cart and delivered several large bags of gas, and threatened to speak casually in the future.

Without the worries of gas, Li Chengfei opened up and used flamejets to kill weeds and insects.

Twenty or thirty acres of land can be done in one day.

Next is irrigation.

There's a culvert here. But the culvert pipe is too thin, and the water flow around the house is used to drive the formation, and it can't be drained casually, otherwise the formation will be destroyed.

There are barrels and slabs on the edge of the field. The previous Lao Zhang should have used a flat pole to carry water for irrigation.

This one is so tiring.

Li Chengfei spent money to hire Qi Xiaoer and Fei Junyi, let them start, and began to build waterwheels.

Jingle Bell!

The three of them were cutting wood and were busy.

When Li Chengfei was working, he always felt his hairs stand up for a while, as if he was being stared at.

I looked around, but I couldn't see anyone.

His gaze fell on a large tree not far away, and he looked at it for a long time.

I couldn't see anything unusual, so I could only suppress my doubts and continue to work.

"This mortal! It's so far away, how many times can I look at him, and he can actually feel it? ”

It was still the gray-haired old man, holding a wine gourd in his hand, sitting on the branch of the big tree - it was the big tree that Li Chengfei had just looked at carefully.

Li Chengfei and the three of them were busy for nearly ten days, and a waterwheel finally stood by the river.

Seeing the waterwheel whirling and the river being transported, Qi Xiaoer and the others were shocked.

"Lao Li, you are too capable! You're not afraid you're not the reincarnation of an immortal, right? ”

There were no waterwheels in their village, and it was the first time they had seen it.

Li Chengfei had long discovered that this immortal realm was the world of the immortals, and the immortals' various methods were extremely wonderful, not only understanding the immortal law, but also magic weapons like the desert boat.

However, the level of development of mortal civilization is quite low, similar to that of the pre-Qin period.

Smart people are busy cultivating immortals and taking the path of immortals. No one is going to put their mind to the strange tricks of mortals. This is probably the reason why the mortal technology of the immortal realm has not been developed.

"Lao Li, after we go back, can we make one for our village too?" Fei Junyi asked cautiously.

"Absolutely!" Li Chengfei nodded.

"Who taught you this waterwheel?" Just then, a voice suddenly sounded.

The old drunkard didn't know when he was standing behind them.

"You old man! When did you come over? Scared me. Qi Xiaoer complained.

Li Chengfei's heart beat violently, and his palms began to sweat.

He couldn't feel the slightest mana fluctuation from this drunkard old man.

But he didn't dare to treat this drunkard old man as an ordinary mortal.

It is impossible for a mortal to appear by her side without him noticing.

Li Chengfei's divine sense is comparable to that of an immortal.

"Brother Qi, be polite to your elders." Li Chengfei forcibly suppressed the shock in his heart and tried to make a calm appearance.

In case this is a narrow-minded immortal who will be revenged, because he is not happy with a word, he slaps the three of them to death, where can he reason with it?

Then, he smiled and said to the old man: "This waterwheel is from our hometown, I have seen it since I was a child, and I can't talk about who teaches it." ”

"Where is your hometown? The old man has traveled a lot of places in his life, but he has never seen this thing. It doesn't need to be driven by mana, and there is no inscription formation, it can be pushed with just water power, although it is rough, but it is also interesting! The drunkard old man raised his head and poured a sip of wine, smashed his mouth, and looked up and down around the waterwheel.

"I'm a foreigner, I've only been here for a short time, and my hometown is a little far away......," Li Chengfei looked embarrassed, and he stopped talking.

"Oh, it's coming from the running line!" The drunkard old man immediately understood, and he didn't ask any more.

People who run the line are generally reluctant to talk about their hometown.

"You're so atmospheric, such a good thing, just teach people casually!" The drunkard old man said.

The immortals cherish all kinds of magic utensils and make them.

"The waterwheel doesn't have a big technical threshold, just stand by the river, and a skilled craftsman can take a few more glances and ponder it, and you can master the trick. Even if I wanted to hide my secrets, I couldn't hide them! That's how I learned. Nothing atmospheric. Li Chengfei said.

His calm posture caused the drunkard old man to nod again and again, and he appreciated him a little more.

"You're an interesting person, but it's a pity that you're too old and have poor qualifications, so you won't have a chance to be a fairy in this life!" After seeing the watermill work, the old drunkard quickly lost interest, drank the wine, and walked away.