On an ordinary night, the four of them left this side of the world, and they chose to go back. Pen & Fun & Pavilion www.biquge.info

Except for Zhang Guoan and Jingjing, no one saw how Wu Dapeng Shibo and the other four people walked, which added a sense of mystery to the hearts of the people in the Badaohe area.

Zhang Guoan smiled and said to the twenty and a half children: "This is an ability, only the people of Yin Di Anguo can ------"

Powe said: "When will we meet? Master Wu said that if we study hard, we will also become people in the new Yindi Anguo------"

Zhang Guoan nodded earnestly in approval and said: "Yes, as long as you study hard, you will become a new Yin Di Anguo from the inside out!" ”

The twenty and a half sons were happy, and they had to step up their military training, which was ordered by Lord Wu's family when they left

In fact, Zhang Guoan and the quiet couple are now a little disappointed in their hearts, not because they chose to stay, but because their four friends left them.

They now feel as if the Badao estuary village is half empty.

The two men walked around the base.

The thousands of acres of paddy fields and dry fields they planted are growing well, especially the high-quality and high-yield rice varieties they brought over, which are not hybrids, and the yield per mu will not be ridiculously high.

Zhang Guoan chose it because it could ripen within 60 days and taste good.

The taste of hybrid rice, they really have enough to eat.

In the dry fields, they saw that the sweet potatoes, potatoes, and cassava were all growing vigorously!

The two of them feel more comfortable, as long as the three major potato species in this world appear together, famine is unlikely to happen.

As for cassava, they bring non-toxic seeds.

The corn seeds they bring are also high-quality varieties and can be kept.

The hundreds of corn plants swayed gently in the breeze, and they had their own joy.

As for some vegetable cultivation, Zhang Guoan handed it over to Japanese farmers, who were far more patient than the black East Africans.

The blacks of East Africa arranged to plant jute in the mountains.

They found jute in the mountains, which is common on the island of Liuqiu, so they opened up fields on the slopes of the mountains and asked the black East Africans to go to the mountains to find jute plants, dig them up and plant them, so that they could concentrate on fertilization.

Walking quietly, he said to Zhang Guoan: "Guoan, you see, everything is very good, there is no change, I will never carry a pistol with me anymore, I will be dead and heavy." ”

Bringing a pistol was requested by Zhang Guoan, and he now feels that it is a little redundant, no matter where it is, there is no change from usual.

When Wu Dapeng was leaving, he asked them to be careful of the civil uprising, which seemed to be redundant.

As long as food and clothing can be solved, as long as wages are paid on time, it is nonsense to want them to have a civil uprising.

Zhang Guoan said: "It's okay to be careful, if you don't bring it, don't bring it!" ”

But he would always carry it, and he knew that Quiet didn't like guns in the first place.

Then the next main task is to build the castle.

Zhang Guoan summoned the craftsmen to discuss together.

The plasterers made a big fuss about the so-called drawings of Zhang Guoan's bow.

"Zhang Chuangong, why are most of the houses within the city wall two floors connected together?"

Zhang Guoan's bow said: "Save building materials and increase strength. ”

The plasterers immediately understood that it was certain to save building materials and increase strength.

During this time, they felt that the ground shook a few times, Wu Dapeng Shibo said at the time, this is not a giant fish turned over, it is an ordinary earthquake, people walk more on the ground, of course, it will eventually cause the earth to shake------ some people believe it, some people don't believe it, but it is also useful to increase the strength of the house.

"Zhang Ship's bow, the city wall is hollow? Maybe a lot shorter------"

Zhang Guoan's bow said: "We have prefabricated plate technology, which is not short, and we also have arquebuses and artillery!" ”

When the craftsmen think about it, it really makes sense!

Zhang Guoan's bow asked them to mix gum and sand and gravel together to create a model to add a three-dimensional feeling.

If the craftsmen figure it out, the rest will be easy.

The salt is out of the Badaohe salt field.

Zhang Guoan immediately ran over to take a look.

Previously, the salt workers here obeyed the arrangement of Wang Defa's bow to stir the second-class salt pans twice a day with large bamboo fences after the two windmills drew the salt brine from the first-class salt pans to the second-class salt pans.

According to Wang Defa's bow, this will make the salt grains more uniform and white.

The saltmen didn't understand, but they had never seen the bow say something wrong, so they did as they could.

On this day, they saw that the shallow second-level salt field really produced salt grains the size of soybeans, and it was extremely white, and they immediately sent someone to report it to Zhang Guoan's bow quickly!

Zhang Guoan's bow rushed over, and he saw the salt workers dragging heavy wooden chops in the secondary salt pond, collecting salt grains little by little.

He felt that it was the so-called level of salt washing in that world, and it was good to use it to pickle pickles.

The salt workers were so happy that they had pushed the salt into a pile, and they tasted it one after another, and shouted, "It's all good salt, it's all good salt!"

They brought bamboo baskets, loaded them with wooden shovels, and carried them to the shore for everyone to see.

Zhang Guoan bent down at the bow and picked up a grain, licked it, the saltiness was enough, and there was still some bitterness.

Then he remembered the planned method of refining salt.

They are prepared to process it by the torment method.

The decoction method is to rinse and filter impurities such as sediment and other impurities in the saturated raw brine first, add sodium carbonate and sodium hydroxide respectively to remove magnesium and calcium ions in the form of precipitate, and then send it to the decoction pot to be steamed into refined salt.

As for sodium hydroxide, it is very simple to think of, and it is prepared with lime milk and sodium carbonate solution.

The equation is clear at a glance: Ca(OH)2+Na2CO3=CaCO3↓+2NaOH.

The process of making this refined salt is so simple, but I'm afraid that the emperor of the Great Song Dynasty is eating that kind of earth salt now, right?

Therefore, the ancient dishes did not feel how delicious, the salt was not good, and the natural ingredients were blind.

Zhang Guoan decided to follow the plan designed by his friends, partly selling the coarse-grained salt, and partly exchanging refined salt for high-end goods.

When Song Ziqiang left, he had already left him more than a dozen reactors of different sizes, well, the largest one was larger than the iron pot, and it also had a lid, although it had been carefully polished, but the sealing effect was not good!

Song Ziqiang's face was a little red at that time, and he said: "Don't blame me, this reactor is too large, and I dare to guarantee the precision of the smaller ones, too big ones, as far as the precision casting equipment is concerned, the requirements are too high."

If you really want to seal it completely, there is a way, you can ask the craftsman to fill you with tin and lead, and I have left a slot! I want to open it, and then burn it------"

Of course, Zhang Guoan can only express his gratitude, it's better than using a big iron pot, right?!

And there is a scale in that large reactor, at least there is no need to weigh the water.

Zhang Guoan asked people to put 100 kilograms of water, ordered a salt worker to boil it, and then weighed out 39 kilograms of coarse-grained salt, and told the salt worker that after the water boiled for a while, he would put in the salt, no more, no less------ because when the water was 100 degrees, the solubility of coarse salt was 39, of course, this was not necessary to tell the salt workers, just do it.

He went to prepare sodium hydroxide himself.

He had one kilogram of quicklime brought to him, which was then stirred with three kilograms of water and made into lime slurry.

Mix 500 grams of sodium carbonate with a kilogram of water, heat it over low heat, and the solubility of sodium carbonate is 50 when the water temperature is 40 degrees, so it will all dissolve in a while.

At this time, he did it himself, gently poured the sodium carbonate solution into the lime slurry, and then stirred it repeatedly, and finally after clarification, it can be observed that it is clearly divided into three layers, the sedimentation layer, the slag-water mixed layer, and the clear water layer.

He carefully scooped out the layer of clear water, weighed it 1,100 grams, and then sprinkled some sodium carbonate into it, and found that there was no precipitation, and he felt almost there.

At this time, I measured it with a piece of pH paper, and the blue one was about 12 pH values.

He brought a jar of sodium hydroxide solution to the large reactor, and saw that the salt worker was stirring vigorously, and the whole big bamboo shed was steaming, and the water was boiling.

When the saltman saw him coming, he said, "Bow Zhang, this salt has just been dissolved------

Zhang Guoan nodded with satisfaction and said, "Okay, let's stop the fire!" ”

Another salt worker immediately crushed the fire under the reactor and closed the fire door.

As soon as the steam had dissipated, he gently sprinkled the sodium hydroxide solution into the brine, and then asked the salter to stir it.

After a while, the salt worker shouted, "Strange thing, why is there only this little bit of salt?!" ”

Zhang Guoan understood that it was a precipitate of calcium and magnesium ions.

He said, "Stir a little longer!" ”

After a while, the man said, "It's not good, it's not much!" ”

At this time, Zhang Guoan estimated that the reaction was completed, and he began to look at it, and sure enough, he could see that there was a deposit at the bottom of the reactor, which looked like table salt, and it was not too much.

He also had the brine scooped into an iron pot and then boiled, so that the sediment would not be touched, and even the brine at the bottom would be discarded------

The salt produced in this way may be called refined salt.

When Zhang Guoan saw the two salt workers tasting the salt again, they were all stunned, this is really refined salt!

Zhang Guoan tasted it, and it was really much better, there was no bitter taste------ or there was a little bit of it, and he couldn't taste it.

The two saltmen said, "Zhang Chuangong, let this salt be used by you alone!" ”

"How can I use so much salt, so let everyone taste the taste of refined salt."

After speaking, Zhang Guoan asked people to weigh the weight of the salt, and then remelted it into water according to the ratio of one to one hundred parts, and then went to drink it to the people on the construction site!

At this time, it was used as salt water to quench thirst during summer work, but unfortunately there was no sugar, but it was not urgent, and it would be available later.

But the two salt workers didn't know this, and thought they were letting everyone taste the refined salt, and they were a little moved.

Zhang Guoan didn't pay attention to the two of them, he was trying to find a way to design the process of processing refined salt, and now it is a bit troublesome to process it like this.

Soon, the people in the Badaohe base drank the refined salt water and expressed their gratitude to Zhang Guoan's bow for his kindness.