The foundation of the wall, after the underground part was built, exposed this layer of the ground, everyone built it relatively slowly, and Wang Tian did not urge, and directly handed it over to the thin head.

Let him figure out how to do it well, slow down or don't build it well, it's a big deal to pick it up and build it again.

However, Wu who was watching from the sidelines was in a hurry, and he was eager to carry out the population exchange plan as soon as possible.

Because Wang Tian told him that the prerequisite for the implementation of this plan was the completion of the construction of the wall, and after the protection of the wall, the tribe would be able to defend the salt mines and the tribe's caves.

The charm of salt lies in the fact that after people get used to eating it, it will be difficult for people to eat food without salt, and salt has always been synonymous with explosive profits in Chinese history.

The huge benefits and the indispensable attributes of salt are the basis of the deal, the guarantee of the peaceful expansion plan, and the risk.

In Capital, Marx quoted the British economic commentator T. Jo Denning: "If there is a 10% profit, capital is guaranteed to be used everywhere,,, there is a 300% profit,,, even the danger of hanging the head." ”

Such an explosion is enough to make anyone crazy and lose their minds, and naturally it can bring disaster to the tribe.

With the efforts of Wang Tian and the tribe, the Tianlong tribe will have more and more crazy wealth like salt and pottery, and when creating these things, they must think in advance of how to keep these things.

Otherwise, these things will only bring disaster to themselves, and economic strength and military strength must ensure that they can go hand in hand.

Economically strong and militarily backward, like the Manchu government of later generations, fat but not strong, rich but not strong, a huge empire, in the eyes of the Western powers, is just a white pig waiting to be slaughtered and eaten.

For this reason, Wang Tiancai put the construction of the city wall and the development of bows, arrows, bows and crossbows in front of the development of agriculture and the acquisition of wealth through trade.

Later generations of grandfathers said that "power comes out of the barrel of a gun", strong military strength is the basic guarantee of all activities, and the truth is always only within the range of artillery.

For the radicalization of Wu, Wang Tian patiently explained the truth to him, Wang Tian suddenly found that I don't know when the most radical person in the tribe is no longer himself, when did Wu start to change?

In order to divert the attention of the witches, Wang Tian turned the topic to the manufacture of linen.

Wang Tian took out his last belongings: bottoms, and handed it to Wu a little embarrassed: "Wu, you see this is a fabric, he is the same as animal skin, which can be worn on people's bodies, and can keep warm from the cold like animal skins."

For the "cloth" thing, Wu has actually studied it a long time ago, when Wang Tiangang crossed over, because his body became smaller, the "ancient" work clothes he wore were now handed over to Wu for safekeeping.

For this thin airy cloth, in Wu's understanding, it is limited to the material used to make the "apron".

He didn't have anything to do with this thin cloth to keep warm from the cold, and his knowledge of cloth was more understood as the feathers on his head when he sacrificed.

Wu regarded it more as a magic weapon, an object for communicating with the gods.

So when Wang Tian told him that the tribe would start producing this kind of material that could keep warm from the cold in the future, it did not attract his attention.

In his opinion, it is enough to keep warm from the cold and have animal skins, and he is also a little dissatisfied with what Wang Tian said that after the weather is hot, he can use this thinner fabric to make clothes.

Used to make clothes when it's hot? It's so hot that I can't wear it directly! Wouldn't that be cooler? But after Wang Tian's words, his concept was completely changed.

In fact, Wang Tian didn't say anything, but told him clearly that cloth could be traded with other tribes in the future, like salt and pottery, and could also become an important material for obtaining population.

In fact, cloth was used as legal tender for a long time in ancient China.

Wang Tian's statement undoubtedly hit Wu's heart, and after Wang Tian finished speaking, he was already beginning to regret telling Wu about the population expansion plan too early.

Wu's urgency to build the wall, his interest in salt, ceramics, and now cloth all stemmed from a desire for the expansion of the tribe's population.

The greatest hope of this old man, who has worked for the tribe all his life, is to see the tribe's population continue to grow and develop, and a tribe with a large population can go further in the primitive era.

Wang Tian was worried that if this continued, Wu would sooner or later become a demonic obstacle, and had just pulled Wu out of the tribal expansion plan that Wu had thought of from the wall.

In the blink of an eye, another cloth population expansion plan was thrown, isn't this to aggravate the rhythm of Wu's condition?

Wang Tian can only say that he is also helpless about this!

A few pregnant women with big bellies in the tribe have extracted some of the plant fibers, and piled up several piles of rotten grass leaves stripped of plant fibers on the viewing platform.

Wang Tian originally wanted to throw the garbage into the manure pit, but when he saw that there were still a lot of plant fibers in it that had not been fully extracted, he changed his mind.

Isn't this a good raw material for papermaking? It's good to weave and take hemp while picking up grass and beating rabbits, anyway, nothing is delayed, at least you can make straw paper to wipe your ass first.

Wang Tian had enough of using sticks, leaves, and stones...... Day!

Arrange for several pot-bellied women to put a cauldron on the viewing platform, and according to the steps instructed by Wang Tian, put these weeds in the pot and boil them.

There are many materials for making paper, such as roots, bark, fishing nets, and bamboo, as long as plant fibers can be extracted from them, they can be used as raw materials for papermaking.

Just like using bamboo as a raw material, in addition to the long time of soaking and rotting, it is also necessary to repeat the beating when it is processed in the later stage, so that the fibers in the bamboo can be separated more easily.

But for these soft rope grasses, this step can be omitted, and they can be steamed directly on the fire and boiled into a paste. In fact, it doesn't matter if you don't boil it, but after boiling it once, it is more conducive to the separation of fiber components.

After boiling, the fiber slurry is diluted and stirred with water to allow the plant fibers to float evenly in the water.

After that, use the woven doughan to pick up an even layer in the pond water, drain the water, flip it over, buckle it flat and cover it on the bamboo pole, gently knock the back of the dough basket, and then fall on the bamboo pole The adhesive is a piece of wet paper.

Next, you only need to dry the wet paper after being exposed to the sun.

The speed of making paper from herbaceous plants is much faster than that of bamboo bark, but as the saying goes, there must be gains and losses, and the quality of the paper will definitely be much worse if the speed increases.

This kind of paper can only be used as straw paper, and the fiber extracted from the arbor, because of the fine wood, the diffusion speed and degree of water on the paper are far less than that of herbal fiber paper.

This kind of paper can be used for writing, for the ancient times when there was no ballpoint pen, the degree of water seepage of the paper directly determines its value.

Sometimes it's not necessarily a good thing to have a hard time on the back of the paper, it just means that you have taken a piece of straw paper to write on.

Looking at the wet paper hanging everywhere in front of him, Wang Tian smiled happily, and finally no longer needed to wipe his butt with those strange things.

The only concern is that the texture of the straw paper is very bad, and when it comes to wiping your butt, it is easy to ......

The purpose of paper, of course, is not only used to wipe the buttocks, otherwise Cai Lun's coffin board in later generations will not be able to hold it down, of course, the current Wang Tian does not need to think about this, Cai Lun's grandfather's n grandfathers, and now they don't know if they have evolved into humans.

Not being able to write as a piece of paper is in itself imperfect, and although straw paper is not suitable for writing, it is much more convenient than a slate used for witchcraft.

This kind of papyrus may not be suitable for ink writing, but it is not burdensome to use for graphite pencils that have already been made.

Compared to slate, straw paper can record more things and is more convenient to consult, such as the genealogy required to establish a marriage system.