(For book friends Ice and Snow Overlord Dragon Ten Thousand Rewards)

After the anorexia caused by the heat was completely cured by Han Cheng with a few bowls of cold powder, Wu's spirit appeared very good and returned to his previous appearance.

After Han Cheng saw this kind of fruit that had eaten big feet and was almost filled with dung, Wu Du looked happy in his eyes.

As early as before, he wanted to ask Han Cheng what the use of this kind of fruit was.

It's just that Han Cheng was in a very excited state at the time, and he was constantly arranging things there, so he held it back until now.

"This thing can be used to squeeze oil, and the oil can be used to brush things like rattan armor, rattan helmets, and rattan shields, as well as tribal wood used to build houses and the like.

Rattan armor can become very strong after being brushed with the oil of this thing.

Not only will it no longer be damaged by the mess, but it will also become so strong that it is difficult to cut it with a knife!

The rest of the wood is brushed with oil squeezed from this thing, so you are no longer afraid of wind and rain, and you can greatly extend the use time of the wood......"

Han Cheng was full of excitement and told Wu about the benefits of tung oil.

When Han Cheng said this, Wu also became happy.

Wu's happiness is not quite the same as Han Cheng's happiness, Han Cheng is happy to get tung oil, and then be able to greatly improve the quality of things like rattan armor.

Wu is more happy that with this kind of oil that can poison people's fruit in front of him, the Son of God will no longer spoil the fat oil in the tribe.

A few days ago, Han Cheng used fatty oil to brush the rattan armor, but Wu was distressed.

This kind of fruit can poison people, and the oil that comes out should not be eaten, in this case, no matter how much you brush these things on the vine armor, Wu will not feel distressed.

"Son of God, then let's quickly get these fruits out of oil!"

Wu said excitedly.

If you get this oil out sooner, Miko won't be able to use delicious fatty oil to brush vine armor and other things.

"Well, squeeze the tung oil out!"

When Han Cheng was told by Wu like this, he suddenly had such a thought.

The sooner you squeeze the tung oil, the sooner you can perfect the rattan armor!

Han Cheng got up as he spoke, ready to start squeezing oil, but after taking two steps, the whole person was stunned.

Damn! What do you use to squeeze the oil?

In later generations, Han Cheng saw that the oil extraction was to send soybeans and rapeseed to the oil mill on the street, and let people use electric belt machines to extract oil at home.

After the machine comes down, the rapeseed is pressed into cakes, and the oil that is pressed falls down the oil into the basin below.

It's just that with a person like himself with a liberal arts background, even if he makes himself hard to die, he can't make such a machine!

In addition to using a machine to extract oil, there is another way to get the oil out.

This method is to grind the oil with a stone grinder, and the fried sesame seeds are finely ground into sesame paste with a stone grind, and then the sesame paste is placed in a large pot with a round bottom, and the sesame paste is kept shaking one after the other.

After shaking like this for a long time, the oil contained in the oil residue will be shaken to the top.

After lifting the top layer of oil with something, continue to shake it.

After shaking continuously for a period of time, the oil will be shaken out of the oil residue.

Han Cheng's grandfather used to grind sesame oil for a long time, and then used a flat pole to carry the oil pick to buy oil, and the two stone mills at home were left at that time.

When Han Cheng hadn't crossed over, he had gone back to his hometown to see that in the barren courtyard, many things had been dilapidated, and only two stone mills were still quietly leaning against the wall.

There is still a training stick behind the door, and there is no sound of children in front of the hall......

When I was a child, I had seen my grandfather do this, and all Han Cheng was no stranger to grinding sesame oil.

It's just that in my memory, it seems that only small sesame oil is ground with stone grinding, and the rest, such as peanut oil, soybean oil, and rapeseed oil, are all squeezed out by machines.

It's a little fucking embarrassing......

"Miko, why don't you get oil?"

On the side, he was also looking forward to Han Cheng being able to use these fruits to get oil out earlier, and then no longer went to fight the idea of fat oil, but when he saw Han Cheng, who said that he was going to squeeze oil, he didn't go immediately, but stood here in a daze, and after being stunned for a while, he finally couldn't help but open his mouth.

Han Cheng sniffed and squeezed oil, I wanted to too, I wanted it more than anyone in the tribe, but it didn't have a suitable oil extraction tool for itself!

You can't bite it with your teeth, can you?

If you do this, it is still a trivial matter whether your teeth will be tired, and the most important thing is that if you chew it for too long, you will have to be served by a dung scoop......

I still think things are too simple, and I just think that as long as I have tung oil fruit, everything will be fine...... Sure enough, there was nothing simple in primitive times......

After standing here and hesitating for a while, Han Cheng could only choose to use the method of grinding small oil to see if he could successfully get some tung oil.

As for oil extraction, it looks like a lifetime series!

"Well, let's go grind the oil." Han Cheng said, he had quietly changed the oil extraction to oil grinding.

However, Wu did not notice some changes in the wording, and even if he did, he couldn't tell the difference, because Wu didn't understand these things at all.

Han Cheng put the tung oil fruit in his hand on the ground, and then asked people to get clean river sand from the side of the river.

Then I got a lot of sand and put it in the pot, and let people burn the fire under the pot.

Seeing such a scene, the witch who followed him, and the rest of the people who helped were dumbfounded.

The people of their own tribe, even when they were the most bitter and the food was the most scarce, no one had ever eaten soil, and the Son of God was so powerful now that he directly crossed the low-level realm of eating soil and changed to eating sand!

It's just that this fine sand is very toothy when it is bitten on weekdays, but now it is put in the pot like this by the Son of God, and it is fried back and forth with a shovel, can it become toothless?

Although the act of frying sand in a pot seems extremely unreliable, there are many things that Shenzi does on weekdays that seem unreliable to them, and later most of them have become things that are very beneficial to the tribe.

Some people are even eager to try what it is like to stir up the sand with Miko's own hands.

Among them, Shuwu, an old primitive man who recovered from the initial shock, was the most excited and fanatical.

If the sand can be stir-fried like this, it will become delicious, and then your tribe will be more comfortable in the future!

There is no need to plant the land, and when you are hungry, you can go to the river and get some sand and fry it.

Even after traveling to the primitive era, Han Cheng's nerves had become very tenacious after going through thousands of tempers, and after understanding Wu and their thoughts at this time, Han Cheng's face still couldn't help but twitch.

It's so brutal! More ferocious than himself, a man who came from the foodie empire!

As a person from a big foodie empire, he didn't dare to talk about this sand, so you guys had the idea of relying on eating sand to eat it directly......

"This sand is not edible, not only stir-fried and inedible, even if it is boiled, steamed, steamed, and steamed, it is also inedible, and it is the same when you put things like green onions, ginger, and salt......"

After feeling the ferocity and good teeth of everyone in the tribe, Han Cheng waved his hand again and again, and popularized science for everyone, especially Wu, and even more so to explain it well.

Half of the old man's teeth are about to fall out, so if he tastes the fried sand and loses some more, what if he loses some more?

In order to prove that he fried sand not for eating, after frying all the water in the sand and feeling the sand was already a little burnt, he quickly dropped half a bag of tung avocado fruit that they brought back into the pot with the sand, stirred it with a shovel and began to fry it.

To grind small grinding oil at home, you need to fry the sesame seeds first, so that not only the oil is fragrant, but also the oil yield can be improved.

Since Han Cheng wanted to get tung oil according to the method of grinding small oil, he naturally needed to follow such a procedure.

Also, I remember that I had seen it there, and it was said that cooked tung oil was more effective than raw tung oil.

The tung apocarpus is large, and if you don't add to Gaza, if you want to cook it completely and easily, the most likely thing is that the outside has been fried, and the inside is still not ripe.

But with sand that can be cared for in all aspects, it is not only able to heat the buried tung oil fruit evenly, but also to prevent the heat from becoming so scorched.

With experience in frying shelled peanuts, Han Cheng was able to think of such a method, and it was not uncommon to fry this tung avocado well.

After some stir-frying, Han Cheng confirmed that these tung oil fruits had been fried, and then let people withdraw from the fire.

After letting it cool a little and making the sand cooler a bit, people found a bamboo sieve.

Even the sand in the tung apode was shoveled into the bamboo sieve together, and the hands were dried back and forth, and only the fried tung avocado was left in the sieve.

Such a simple and quick method made the eyes of people who were still thinking about how to get these tung oil fruits out of the sand.

"It smells so good!"

Han Cheng called some people and peeled the fried tung oil fruit with him.

Unlike when it was not fried before, the freshly fried tung avocado has a hot aroma.

Someone is peeling the shell and sighing here.

If it weren't for the big feet that ate the tung oil fruit and were still lying on the bed at this time, and Miko explained over and over again that they couldn't eat these things, and eating them would poison people, these people would definitely send this smelling fruit to their mouths......

Wu is secretly sending something into his mouth at this moment, not tung oil fruit, but some sand that has dropped in temperature by secretly poking and poking.

Although Han Cheng had made it clear that these fried sand could not be eaten, Wu was still moved by the scene he imagined of bringing back some sand from the river to fry and eat whenever people were hungry.

So I secretly poked and poked some sand and put it in my mouth......

"Phew, Phew......"

The witch spat out the sand there, and this thing was really the same as the son of God said, it was not delicious.

Han Cheng, who watched the scene of Wu spitting out sand, wanted to laugh again, and his face twitched a little.

In fact, when Wu secretly hid sand in his hand, Han Chengcheng saw that the reason why he didn't stop it was because Han Cheng felt that Wu's spirit of exploration was very commendable.

Although he is a person who has come from the past, he is not an all-powerful person, and he can't do many things by himself.

In such a situation, it is extremely important to cultivate new people and cultivate the spirit of exploration of the tribe, and only in this way can the tribe develop better......

Han Cheng did not go directly to grind the peeled tung oil fruit with a stone mill, but prepared to smash it with a stone mortar first.

Because compared with soybeans and peas, the size of tung avocado is still too large and not easy to grind, so it is best to mash it with a stone mortar first, and then grind it into powder with a stone mill.

"Boom! Boom! ……”

Han Cheng didn't let others do it, but held the wooden pillar and pounded it there one by one.

As he continued to exert his strength, the tung oil fruit fried in the stone mortar was smashed, and later, after the tung oil fruit became more broken, with every impact of Han Cheng, there would be oil faintly seeping out, and when the wooden stick was put away, the oil would retract again.

After mashing all the tung oil fruits he brought back, Han Cheng put them in a bowl and bowl, and then got them to the stone mill to grind.

As the stone mill rotated in circles, the smashed tung avocals were ground little by little and fell from the periphery of the stone mill.

Looking at the ground tung oil fruit, Han Cheng's face was not very good-looking.

Because the ground tung avocado was not what he imagined.

I have the impression that when I grind fried sesame seeds, the sesame seeds will directly turn into sesame paste, like soy milk, and slowly flow down the perimeter of the stone mill.

And now, these ground tung avocets, although they also look oily, do not come out of the sauce, but in a relatively loose state of powder or something.

What the hell, this doesn't make sense!

Grinding oil is already the only way I can think of to make tung oil at this time, and now, it has become like this!

Looking at the crushed tung oil fruit that had fallen into the grooves around the stone mill and had stopped moving, Han Cheng's heart was half cold.

There is no need to carry out the next step of shaking oil, Han Chengji has already determined that it is basically impossible to make tung oil like grinding oil......

"Alas~"

After not giving up, he put all the ground tung oil fruits into a clay pot with a sharp bottom, and sat there and shook for a long time, and after not a single oil flower appeared, Han Cheng finally gave up this futile practice, sat on the lower wooden pier, and couldn't help but let out a long breath.

Seeing that the tung oil fruit is right in front of you, but you can't get the oil, this is really infinitely melancholy.

From great joy to great sorrow, this rollercoaster-like psychological experience is really uncomfortable......

As twilight fell, time passed slowly, and the night grew darker.

After Little Pea and Bai Xuemei beside him fell asleep one after another, under the cover of night, Han Cheng lost all his disguises, lay on the kang, looked at the dark roof, and was worried about the matter of tung oil.

He had been thinking about this for a long time, and his mind was a mess, and he still didn't have a clue.

After a long while, he threw all the jumbled thoughts out of his mind and considered the matter from the very root.

The so-called oil extraction, to put it bluntly, is to use a large enough pressure to press out the oil contained in the raw materials that can produce oil.

Later generations of oil extraction machines were designed according to this principle.

Theoretically, as long as the space for the existence of oil can be reduced as much as possible and enough pressure can be given, then the oil can be squeezed out of the oil, not necessarily the kind of oil press with electric belt in later generations.

Moreover, in ancient times, when there were no oil presses, there were also vegetable oils, some of which were used for eating, and some of which were used for lighting.

No matter what it was used for, this clearly told Han Cheng one thing, that is, the oil press that did not rely on the electric belt of later generations could also squeeze oil!

That said, there are other ways to extract oil.

Thinking along this line of thought, after a long while, Han Cheng sat up from the kang, fumbled and lit the oil lamp, wrote the word 'squeeze' on the ground with charcoal, and squatted there to look at it carefully.

After looking at it like this for a while, Han Cheng's face grew with joy.

Separate the word 'squeeze', it is a '柞' plus a 'hole'.

This is very revealing, and it can be understood as using a stick to pound into another pit.

In addition, Han Cheng remembered that during the day today, when he was holding a stick and mashing the fried tung oil fruit in the stone mortar, there was a scene where the tung oil faintly emerged from the tung oil fruit with his force, how not to use the oil press, but the method of squeezing the oil out had vaguely appeared in Han Cheng's mind.

After figuring out this, there is another point that Han Cheng needs to solve, that is, how to let the oil squeezed out of the wooden stick flow out, instead of retracting the wooden stick and retracting it into the oil

Today, when he smashed the stone mortar with a wooden stick, the moment he smashed it hard, there was a faint appearance of tung oil, and then it shrank back again.

If you don't take back this wooden stick, but continue to add wooden sticks to it, and compress the space inside the stone mortar little by little, so that the extruded oil will not shrink back, right?

A lot of things are window paper, and when you don't think of a solution, you can make it difficult for people to die, but once you figure it out, your thinking is getting smoother and smoother, and many of the other problems will be solved!

is like the current Han Cheng.

Squatting here, the more Han Cheng thought about it, the more excited he became, and after this excitement lasted for a while, it subsided a little.

The stone mortar is not a suitable thing for making a 'hole', although the stone is hard enough, but the toughness is insufficient, if the wooden sticks are filled with wooden sticks and the stone mortar is smashed hard, Han Cheng feels that this stone mortar is very likely to be propped open.

After all, when the tribe breaks the stone, it also opens a gap and then uses a stake to prop it up.

It's just that you don't use stones to make 'holes', so what should you use to make 'holes'?

After thinking like this for a while, Han Cheng's gaze once again fell on the word 'squeeze' that he had written.

After a moment, a sudden look appeared on his face.

Oak is a very slow growing tree, because it grows slowly, so the wood is very solid.

The word is not made randomly, when the word "squeezed" was made, the rest of the trees were not selected, but the oak wood, a little deeper thinking, you can understand the meaning of it.

That's the charm of kanji!

There are many things that can be derived from the structure of the characters alone.

Not to mention the rest, just Han Cheng was thinking about oil extraction this time, if he was not facing Chinese characters, but zigzag alphabets, even if he put some spices on these words and ate them, he would not want to get any hints from them.

Blowing out the lamp and lying on the kang for a while, Han Chengdu didn't feel sleepy, and his mind felt heartfelt respect for the wisdom of the ancestors who made words at the beginning......

"Come with me, go and cut down the tree together!"

Early the next morning, Han Chengcheng beckoned some people in the tribe and followed him to cause sabotage.

He fell asleep in the middle of the night last night, and he got up early today and was still in good spirits.

Although everyone didn't understand why Shenzi called for himself and others to go to logging early in the morning, the matter explained by Shenzi was naturally not discussed.

Quercus Han Cheng is no stranger, in his hometown near the river in a few posts, there is a tree grown, that was planted in the last century, it must have been for decades.

None of these trees have grown, because when they were first planted, they were used to prevent wind and fix sand, and secondly, they were used as firewood forests.

Every year when winter comes, people who are idle start to cut it down and pull it back to be used as firewood, and when spring comes, it will sprout again.

In Han Cheng's hometown, these trees are called 'forests', and there are two main types, but in fact, if you look at the trunk alone, you can see too many differences, and the biggest difference between the two is in the leaves.

The leaves of the two trees are similar, except that one has much larger leaves than the other.

This kind of big leaf is called 'Hu Ye' in Han Cheng's hometown in later generations, and when steaming buns at home, Hu Ye is mostly used to lay the pot.

The steamed buns steamed in the Hu Ye Shop have a fresh fragrance of leaves, which smells good and is also very delicious, which is not found in the steamed buns sold in the steamed bun shop.

Both of these trees bear acorns when they grow up.

In Han Cheng's cognition, two trees that look very similar can be called oak wood, but in some places, when talking about oak wood, it only refers to the kind of tree with large leaves.

These two types of trees are also found around the Blue Sparrow tribe.

Acorns, before Han Cheng came over, were also a kind of fruit that the people of the tribe were happy to collect during the winter.

"That's it!" Han Cheng pointed to a oak tree and said to the person holding the tree cutting tool.

Unlike the woods in Han Cheng's hometown that were used as firewood gardens and were cut down so that they had no chance to grow, these oak trees around the Qingque tribe grew tall enough.

After leaving the tribe for a few miles, it didn't take long for Han Chengcheng to fall in love with a oak tree, the kind that two people couldn't hold together.

If you want to squeeze out more oil at one time, then the hole dug out of the trunk must be large, because only in this way can you put in more tung oil fruit at one time.

Correspondingly, the tree where the tool is made must also be thick.

After Han Cheng gave the order, someone immediately had a bronze axe tied to his waist, jumped up the tree three times and two times, and then began to cut branches there.

This is to make the tree less moving and covering less when it falls, and making it safer for people to cut trees underneath.

After cutting off the branches of the big tree, there were four people who often pulled the big saws, and in groups of two, they took two large bronze saws that were usually used to untie the wooden planks, and began to saw, one on the left and one on the right.

The oak wood was solid, especially this old tree that was thick enough, and the tribe used a bronze saw instead of a bald chainsaw for logging, so it was not until the next day that it was almost noon, and the big tree was completely knocked down.

After the trees were brought down, some of them began to transport the severed branches to the tribe.

The coarse ones can be used to build houses, and the thinner ones can be used to burn charcoal.

After a few of the men who pulled the saw, they took the sharpened saw, and continued sawing the thick tree, mainly by cutting off the main trunk.

The work was not completely completed until late afternoon.

By the time everyone had brought the thick trunk back to the tribe, it was already noon on the third day.

Regarding how to make these tools for oil extraction, Han Cheng only had a preliminary idea, and he could only cross the river by feeling the stones.

After returning to the tribe, Han Chengcheng began to let the people in the tribe start making tools according to his own understanding.

It was to dig out a round pit like a stone mortar on the trunk of a tree lying on the ground.

After the pit is dug out, it is tightly tied with ropes on both sides of the pit to prevent the wooden wedges from being nailed too much into it, which may stretch the trunk open.

After doing these things and smashing the wooden stakes into it, Han Chengcheng poured the tung oil fruit that had been ground up before into the pit, and then put the prepared wooden stakes vertically into the pit.

As a result, a few were put into it, and Han Chengcheng stopped moving.

Because after these wooden pillars were put in, part of the loose tung oil fruit powder immediately rose up, and it couldn't be suppressed at all.

After Han Cheng thought about it, he stopped his movements, pulled out these wooden stakes one by one, scooped out the tung avocado powder inside, wrapped it in fine linen, and put it into this wooden version of the 'stone mortar' again.

And then continue often to put wooden stakes inside.

These sticks pressed against the tung avocado powder wrapped in sackcloth, and the situation just now slowed down a lot, but there were still fruit powders that could not be pressed.

Han Cheng could only stop his movements again and continue to think of a solution.

After a while, he asked the lame to bring a plank of about the same shape and size as this pit, put it in it, press it on the tung oil powder wrapped in linen, and then put the stake into the pit again.

This time, because the stake was not directly pressed against the tung avocado powder, but on top of the wooden board that wrapped the tung avocado powder underneath to the wooden board that was completely covered, this incomplete pressure did not happen again.

Seeing this, Han Cheng's face showed joy.

He also knows nothing about how to extract oil, so he can only try to find problems in the process, and find ways to solve them, and improve this method of oil extraction little by little.

So far, it seems that progress is still good.

At first, the pit was large enough to put stakes inside, but as there were more and more stakes, the space inside became smaller and smaller, and it was not easy to put stakes inside.

Later, it can only be smashed with a hammer, and this time is also the most energetic time.

"Knock Knock Knock ......"

With the continuous swing of the hammer, these wooden pillars were smashed and sunk in turn, and the space under the wooden pit was constantly squeezed, and the tung oil fruit was wrapped by the wooden plank, and under such squeezing, the volume was reduced, and the grease slowly oozed out......

After seeing the squeezed out grease through some gaps, Han Cheng's face was full of smiles, and after working for a few days, he finally saw tung oil, how did this make him unhappy? At the same time, this also proves the correctness of his previous thinking!

Han Cheng, who was happy for not long, soon encountered a new problem, that is, although the oil was squeezed out, there was no way to get it out......

Because the pit was basically filled with stakes, there were few gaps, and it was impossible to get anything to scoop out the oil that had been squeezed out.

Helpless, Han Cheng could only make people effortlessly turn the big trunk ninety degrees, the opening parallel to the ground, and pour out the grease inside.

I didn't pour out much, only less than two bowls, and the oil yield was really not high.

But this is enough for Han Cheng to be happy.

But before Han Cheng could be happy, a new and extremely fatal problem reappeared, that is, the wooden stakes that were stuffed into the wooden pit one by one could not be taken out!

You know, in order to be able to wrap enough pressure on the tung avocado powder below to squeeze out the oil, these wooden stakes were smashed into it one by one with a bronze hammer in the back.

It took so much effort to nail it, how could it be so easy to pull it out at this time?

Lame and the others tried for a while, but there was nothing they could do about it.

Looking at the wooden pit that was nailed like the plastic bucket full of bamboo sticks placed at the door of the deadly string, Han Cheng's face twitched.

It is not easy to solve the problem of automatic oil leakage, you only need to make some small holes on both sides of the bottom or near the bottom.

The sticks that were nailed in couldn't be removed, which was a big problem.

You know, in order to dig out this wooden pit that resembles a stone mortar, it took them nearly two days of hard work, and now it is good, and it has become a disposable item......

And this wooden pit is still too shallow, too small, a can accommodate not enough tung oil powder, according to the current situation, according to this method to squeeze oil, in the case of sufficient tung oil powder, such a pit can only make about five or six catties of tung oil at most, the efficiency is too low, it is not cost-effective.

It's just that this tree is now the kind that two people can't hold together, and how troublesome it must be to find a thicker tree and do it again......