(This section is a partial reference to The Mysterious Island)

This is the last year of tax exemption, and it is also a crucial preparation time in Tianhao's view.

Rock City has become less peaceful, although the place has not been calm in the past few years, but this time it is different, even the civilians at the lowest level feel the anomaly surging in the air.

The armed men in the city have been rotating. The entire regiment went to the fishing village in groups to take a sea boat to Jeju Island in a group to receive musket training.

Tianhao approved six thousand training places, and Broken Tooth and Tianmad were responsible for screening the people below. The entire pro-guard, as well as the tried-and-tested members of the old warband, were the first to be trained. Tianhao's requirements are very clear———— the trainees only consider loyalty, physical fitness is placed in the second place, and even the ranking can be further reduced according to the actual situation.

In the Age of Civilization, when the musket first came to prominence in the history of human warfare, many people angrily accused the musketeers of being "despicable assassins". They couldn't imagine that a mighty warrior would be knocked down by a single buckshot, and that decades of training in weapon combat would be completely ended by the random action of raising a gun and firing it. The historic quarrel is now a choice that Tianhao must face: after three months of normal training, he can get a skilled musketeer. If things change, this time can be drastically reduced to a week.

Shooting is simple, and lining up is not too difficult. As long as a steady and sufficient supply of weapons is ensured, the Rock City Legion can be transformed overnight, and everyone will become a cross-generational musketeer.

In accordance with Cheonho's order, Tong Biao opened an explosives research base on Jeju Island.

Dull yellow iron ore can be found everywhere in the north of the continent. This thing does not contain much iron, and there are too many impurities, including the cattle tribe, and no barbarians of any tribe are willing to use this kind of thing as raw materials to process and refine iron.

Cheonho knows that this is pyrite, and there is also a large amount of it on Jeju Island. The main components of pyrite are iron sulfide, bauxite, carbon and silica, of which the former is the most abundant, as long as the iron sulfide is separated and converted into iron sulfate as much as possible, the required acid can be extracted.

Sulfuric acid extraction has been going on since last winter. Five hundred workers built an improvised road from the test site to the pyrite area on the island, and sturdy women carried baskets on their backs to retrieve yellow ore and smashed the stones with hammers on the periphery of the base. The process was tedious and monotonous, lasting two months.

The men prepared firewood and hay and piled up pyrite gravel on the stacks of firewood. It was a layer of firewood, a layer of ore stacking, a total of five layers, with large pieces of wood in the middle, flowing out of the gap where the air flow in and out. After these preparations, the ignition began.

It's a primitive natural transformation process. Through carbonization incineration, iron sulfide will turn into iron sulfate, and bauxite will become aluminum sulfate, and the whole process will take about ten to twelve days. The powder produced by combustion is rich in iron sulphate and aluminium sulphate, both of which are soluble in water.

The fishing village has a large amount of blubber stored in it. Although it is salted mainly for edible purposes, it also meets Tianhao's requirements. One by one, the jars containing the salted blubber were transported to Jeju Island on a sea ship. The process of saponification is not as complex as imagined, lime water, plus the corresponding amount of plant ash, is processed by natural soda to blubber butter, and in the process of lipolysis rise and precipitation, two substances are produced———— soap soluble in water (crude), and glycerin.

The women gathered the pyrite powder after burning and cooling, put it into huge clay water tanks, poured water into them, and slowly stirred them with thick sticks, and then patiently waited for the liquid to stand still, then settled, and then poured out the liquid on the surface with the help of several people.

This is the solution of iron sulphate and aluminium sulphate. The hydrolysis method is as simple as that, but it is based on the chemical experience that has been summarized countless times on the basis of predecessors.

In the era of civilization, Yunnan had a famous dish called "steam-pot chicken". The recipe is simple, the key is the pot where the chicken is stewed, there is a tube in the middle that connects to the bottom of the pot, and the chicken is cooked by boiling to create steam.

This mixture needs to be evaporated, again in a special steamer prepared in advance. It is also a simple crude benzene operation method, after gasification, it flows along the inclined lid surface and flows into the liquid concentrated in the basin to form iron sulfate, which will form crystals after condensation, and the part that remains at the bottom of the steamer without vaporization is aluminum sulfate, which is a waste material generated in the refining process.

This is where the joy of chemistry lies, and the fact that an ordinary piece of ore has undergone various procedures to become the translucent crystallization it is now in was intrigued by all the barbarians involved, including the Crooked Tooth, who once again developed a sense of awe for the superior wisdom of the young lord.

After all, iron sulfate is not real sulfuric acid, and it still needs a final process.

Iron sulphate crystals are placed in sealed crockpots and roasted to distill into vapor, which condenses into sulphuric acid.

This is the basic raw material of the modern industry of the Rock Collar, and it is also an important part of Tianhao's huge war plan.

There is enough sulfuric acid, there is a large amount of saltpeter, and nitric acid is about to come out.

Tianhao came to the island at this time and went to the base to give guidance.

Tong Biao felt like the legendary Great Wizard, mixing nitric acid with glycerin to obtain an oily light yellow liquid.

"Absolute care must be taken with regard to the stockpiling and production of such things." Tianhao repeatedly advised, his expression was extremely serious: "You can't shake it hard, you can't stir it hard, and you can't have a fierce collision." It unleashes the terrifying power of Thor, enough to kill everyone on this island. ”

Saying something like "explosive yield" to a barbarian is tantamount to playing a harp to a cow. They feared the gods the most, followed by the nobility. The former can decide their fate, and the latter can control their life and death. Generally speaking, the difference is not very big, but they stubbornly believe that the gods are far superior to the kings of the earth in terms of power and status.

On a sunny afternoon, many people, including Quya, Tongbiao, and Zhengjiang, finally understood the true meaning of the phrase "Thor's Fury".

A jar filled with nitroglycerin.

The manufacture of detonators is a complex industrial process, and it is impossible to produce such a thing with the current state of the art of the explosives research base. Tianhao could only settle for the next best thing, he made a detonating device with gunpowder and paper rolls, and the principle and method were actually an enlarged artillery battle. No way, although nitroglycerin is a high explosive, its nature is very special, the flame cannot be detonated, it can only be ignited, and there must be enough impact to trigger a chain reaction to produce a huge explosive effect.

The explosion was deafening, thick clouds of smoke rose into the air, and large rocks that were used as a contrast for the experimental power burst from the side of the cliff, carrying countless sands and earth with a roar and falling to the ground, causing a scalp-numbing vibration.

Crooked Tooth trembled, and fell to his knees in the distance where the smoke had not yet cleared, his forehead pressed against the ground, his thick fangs digging deep into the earth, and he muttered a prayer in fear: "Forgive your servant, O great Thor, for I have not truly understood until now that your majesty is not to be offended, and I will be your eternal follower." ”

Tong Biao stared at the direction of the explosion with his eyes wide open like a brainless fool, his hands clenched into fists, and indescribable fear and excitement rushed through his body. I was afraid because I was stupid, and there were many irregularities in the previous process of blending and manufacturing nitroglycerin. Although Tianhao carefully explained that he must abide by the rules and regulations before this to ensure the safety of every manufacturing link, Tongbiao was a little unimpressed. On the one hand, it is because of its many years of experience as a blacksmith, and on the other hand, it is indeed negligent that it is not a big deal to think that just one liquid is a big deal...... Until now, witnessing the power that could destroy the world, he suddenly felt so small, like an ignorant child playing with artifacts, unaware that the gods were silently watching at him, and could explode into anger at any moment, like ants moving themselves to crush them alive.

Zhengjiang collapsed on the ground. His face was pale, his facial muscles were twitching all the time, and he couldn't stop. The man who sailed the ship and looked down on the sea never knew what "fear" was, and after staying on Jeju Island for a long time, Jeonggang was more familiar with gunpowder than most of the members of the Rock Leader. However, neither the musket nor the artillery that was in the experimental stage gave him the great mental impact he has now. He knew very well that this power was enough to change the world, and no matter how strong the defenses were, they could not stop it.

In total, more than 200 people watched the test explosion.

Many people knelt on the ground like crooked teeth and prayed to the gods in their own way.

Some people were completely stunned, their mouths were wide open, and they couldn't say a word.

More people let out fierce roars, which had no meaning in themselves, and they were stimulated by huge explosions and shocks, releasing the most primitive instincts in their bodies.

Zhengjiang's eyes straightened, he finally recovered from the extreme shock, moved his stiff facial muscles, and let out a soft exclamation: "There is such a thing...... Our towers will be useless, and the walls will be useless. ”

Tianhao strode forward, pressed his shoulder hard, and let out an encouraging hearty laugh: "That's not necessarily. Don't forget, it's our secret. ”

When everyone feels lost in shock and fear, the freshest and most appealing person naturally becomes the leader.

Zhengjiang turned around, trying to control the urge to worship Tianhao, and nodded again and again from the bottom of his heart: "You're right. ”

Curved Tooth had already risen from the ground, and he stumbled to Tianhao and knelt down again, kissing his shoes: "My lord, you are a messenger sent to the earth by the gods. I never doubted that. I have seen your miracles with my own eyes, and I will always be your most faithful servant. ”

All the people present knelt down with the curved teeth, moving neatly without the slightest hesitation.

Tong Biao woke up from the violent mental shock, he gasped for breath, from slow to rapid, and the whole person gradually became excited and excited. Different from the pig who worships the gods, he is a blacksmith of the cattle tribe, skilled in forging, nitroglycerin from raw materials to later blending, all work links are involved, and he does it himself. Tong Biao knows very well that this is a powerful weapon of war, and it is not at all a "miracle" that brainless pigs keep saying.

He came to Tianhao, with respect for the wise man, and asked the question in his heart: "Ah Hao, what is the name of this thing?" ”

"Nitroglycerin, it's an explosive." Tianhao's voice was low.

Tong Biao took a deep breath, his muscular chest rose high, and then slowly fell.

"We can win." Although he didn't point it out directly, he knew that Tianhao could understand the meaning of his words: "No matter who the opponent is, we can beat them hard until he never turns over." ”

……

Few people feel that the population of Rock City is decreasing.

Before the spring ploughing began, Tianhao ordered the relocation of 20,000 residents in the direction of Tianjing City again. Xu Kun has built enough residential areas over there, and the basic defense facilities are also very complete, although there is only one simple road connecting to Rock City, which can barely meet the transportation of materials.

From 1,000 to 3,000 people, Tianhao sent groups of immigrants to enrich the villages in the territory that had completed the early construction. Assignments began last winter, when heavy snowfall erased the footprints of migrants as the cold winter restricted human movement. What's more, when spring falls and the ice melts, the immigrants who arrive at their new homes recharge their energy and are full of energy and energy to usher in the most important farming season of the year.

"Expand the cultivated area and increase grain production" is the slogan put forward by Tianhao this year.

The eventual implementation of policies and programmes requires different forms of publicity. The slogans of the civilized era are dizzying, and they represent the objectives of the higher levels of government in different periods. Now it is the same, the old woman Osmanthus and everyone in the Propaganda Department began to walk the village and alleys early, beating gongs, drums, and singing songs, spreading the will of the young lord in the most primitive way.

"Grow more land, get more food, and have more children."

"Now dig one more acre of land, and harvest one more ton of grain in the fall."

"You can't be lazy at work, God is watching you! People coax the ground, and the ground coaxes the belly. ”

Although Shi Yong surrendered, he did not have any solution to the problem of corn and potato seeds. The lion tribe's precautions were so strict that Tianhao could only promote seawater rice on a large scale in the territory, as well as various high-yield crops brought from Jia 43, mainly wheat and rice, to support the shelves of multi-variety cultivation.

Radishes are grown every season and in large quantities, and together with the stinging melons, they form an important food supplement for the Rock Collar.

Large-scale cultivation of Jeju Island is carried out at the same time as the mainland territory. According to Tianhao's order to Quya: in addition to meeting the normal supply of the island, Jeju City's harvest this year should also set aside sufficient reserves.

This goal is not difficult to achieve.

In the last year of the tax holiday, Tianhao wants to fill all the warehouses.

At this time, Niu Weibang, the king of thunder horns, came to Rock City.