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The gods are the gods of all things, and they are also in charge of the well-being of the family. Their material nature has all kinds of special characteristics, and the life of the people is very close.
First of all, they should talk about their material nature. The gods are in charge of the affairs of the world, and the people eat food and the sky, which is the place of their destiny. Therefore, the divinity contains the special characteristics of keeping food and food, and protects a family's food and food, and rice is not enough. At the end of every year, people make offerings to them, hoping that they will shelter new food and benefits, and help them.
Next time, they will review their physical nature. The gods observe the goodness of a family, and their nature is just. The daily words and deeds of people are all under their attention. Because they believe that they can make a family good in the year, they are all careful in their words and deeds, and act in good ways. This makes the people's customs and customs more honest and kind, everyone is self-disciplined, the family is harmonious, and the society is also harmonious.
Furthermore, the nature of the gods is connected. People believe that they can connect with heaven and earth, and shuttle through the heavens and the earth. They live in the sky all day long, and keep it silently. The year is a year, and the heavenly court is a matter of people. The nature of its communication makes the people feel more awe, and they dare not neglect the sacrifices.
There is also nature and material nature. The gods are important, not high above, not close to. It often accompanies people's daily life, and a family of old and young. People are the center of life, and the gods are also one of the family components. Therefore, when it comes to sacrifice, people often treat it with affection, pray for it, and hope that it can bring more joy to the life of mortals.

In this way, it is a deep shadow in terms of divine nature, people's food, morality, and spiritual beliefs. It is an indispensable part of adult culture.

The gunner is a firearm made of saltpeter, sulfur, charcoal, etc. Its chemical properties are unique and have several significant characteristics.
First of all, its flammability. Saltpeter, sulfur, and charcoal are all flammable. Saltpeter can be decomposed when heated, releasing oxygen, and has a good combustion-supporting effect. Sulfur has a low ignition point and is prone to fire when heated. Charcoal is rich in carbon and is also a good fuel. Mixing the three makes the gun highly flammable. Once ignited, it will burn rapidly and release a lot of heat energy in an instant.
Another is its explosiveness. When the gun is rapidly burned in a confined space, a large amount of gases will be produced, such as carbon dioxide, nitrogen, etc. Due to limited space, the gas expands rapidly, forming a strong pressure. When the pressure exceeds the range of the container, it will cause an explosion. This explosion is powerful and can cause serious damage to surrounding objects.
And oxidizing. Saltpeter is a key component of artillery and is a strong oxidant. In the combustion reaction, saltpeter can provide a large amount of oxygen, accelerate the combustion of other components, and make the reaction more violent. This oxidizing property not only determines the speed and intensity of the combustion of the artillery, but also affects its explosive effect.
In addition, the stability of the artillery also needs to be paid attention to. Although under normal circumstances, the artillery can remain relatively stable, but due to external factors, such as high temperature, impact, friction, etc., it may cause accidental combustion or explosion. Therefore, strict regulations must be followed when storing and using artillery to ensure safety.
In summary, among the chemical properties of artillery, flammability, explosiveness, oxidation and stability all have a profound impact on its performance and application. In the course of ancient warfare and the development of firearms, the understanding and mastery of the chemical properties of artillery constantly promoted the progress and transformation of military technology.

The synthesis of cyanyl groups is quite complicated. Although the "Tiangong Kaiwu" does not cover the synthesis of cyanyl groups in detail, looking at ancient chemical things, you can also find traces of its relevance and try to describe it for you.
In the past, to synthesize cyanyl groups, nitrogen-containing and carbon-containing substances were often used as the basis. For example, some nitrogen-containing salts were co-heated with carbon-containing organic substances, or cyanyl-related products could be obtained. In ancient materials, there was nitrate-containing saltpeter, which was commonly used as a chemical raw material, and carbon-containing substances, such as charcoal and grease, were also common.
Mixing saltpeter and charcoal to heat at a suitable heat may have complex chemical reactions. Nitrogen in saltpeter and carbon in charcoal may combine with each other under the action of high temperature. Although it is difficult to directly generate pure cyanide groups, during the reaction process, intermediates containing cyanide groups may be produced.
Or some biological raw materials can be used. In ancient times, there was no lack of utilization of animals and plants, and some plant seeds, rhizomes, or contained special organic components. With its co-treatment with specific metal salts, such as iron salts, copper salts, etc., in a suitable acid-base environment, or through a series of biochemical reactions, compounds containing cyanide groups can be formed.
Furthermore, in minerals, there may also be available. Such as some metal ores, its associated components are refined, transformed, and reacted with other reagents, or there is a way to synthesize cyanyl groups. With ancient methods, although the technology is not as refined as today's, but with experience and experimentation, one or two can be explored.
The method of synthesizing cyanyl groups often depends on the selection of raw materials and the control of reaction conditions. Temperature, time, and the proportion of materials are all key. The ancient chemical craftsmen, with their diligence and wisdom, constantly explored various synthetic methods under limited conditions. Although they could not be perfect, they also laid the foundation for the development of later chemistry and accumulated valuable experience for the synthesis of complex compounds such as cyanyl groups.

In "Tiangong Kaiwu", magnets are widely used and have applications in many fields.
First, in the military field, magnets are closely related to compasses. In ancient marching battles, in the vast wilderness and the vast ocean, it was crucial to identify the direction. The General Principles of the Martial Arts recorded the method of guiding fish, making thin iron sheets into fish shapes. After being burned red at high temperature, the fish's tail finger was thrown into water in the north, and the iron sheet was magnetized by the geomagnetic field, so as to make a simple guide tool. This principle is based on the magnetism of magnets. With the help of the interaction between magnets and the earth's magnetic field, it guides the direction of the army and ensures that the marching route is accurate and not lost.
Second, in the field of Yanyu, magnets also play an important role. The ancient Kanyu family believed that geomagnetism had a profound impact on the living environment. The characteristics of magnets are combined with the concept of feng shui to determine the orientation and aura field of yin-yang houses. By observing the pointer pointing of magnets, it is possible to judge the prosperity and decline of the earth's qi, good and bad. Although there are many superstitions in it, it also reflects the exploration and utilization of natural forces by people at that time.
Third, in the medical field, magnets are regarded as blindly traditional Chinese medicine. Many ancient medical books, such as the "Shennong Materia Medica Classic", list magnets as middle grade, saying that "the main perihelion is rheumatism, the limbs are swollen and painful, and you cannot hold things." Traditional Chinese medicine believes that magnets are cold in nature and salty in taste. They belong to the meridians of the liver, heart and kidney. They have the effect of calming the liver and Clinically, it can be used to treat insomnia, tinnitus, vertigo and other diseases. Its curative effect has been proven in practice and is an important part of traditional medicine.
Fourth, in daily life, magnets occasionally have unique uses. For example, making some delicate small objects, using magnets to magnetically absorb iron items, adding convenience and interest to life. Although such applications are not widely popular, they also show the ancient people's ingenious understanding and application of the characteristics of magnets.

It is a matter of great importance to the army, and it is necessary to pay more attention to the many problems in the process.
First, the raw materials are the most important. The foundation of good quality and quality needs to be refined, get rid of it, and take its essence. As the "Examination of Work" says: "There are six parts of gold, and six parts of its gold are the first, and the top of the tripod; five parts of its gold are the first, and the top of the axe is the catty; four parts of its gold are the first, and the top of the tripod; three parts of its gold are the first, and the top of the big blade is the top; five parts of its gold are the second, and the top of the arrows; half of the gold is the top of the flintlock." In order to obtain the material of the flexible phase, it is advisable to match the material in the proportion of the temperature.
The second time, the method of smelting is to seek refinement. It is necessary to use a fierce fire to melt the heat into a liquid and remove the heat. The heat of the fire and the strength of the drum need to be properly grasped. If the heat is insufficient, it will melt through; if the heat is high, it will be easy to burn. The heat of the drum can only make the fire vigorous and accelerate the smelting.
Furthermore, the work of the smelting should not be ignored. The reverse overlay and beating of the smelting, such as a thousand times, can make it dense and increase the heat. If you hit it, you need to use all the force, and apply force in different directions, so that the force of each material is balanced.
The second time, the quenching should be especially careful. Quenching can change the hardness of the product. If the good product is quickly immersed in water or other quenching media, the speed and speed are very important. The speed of entering the water is high or low, and it is easy to crack. The water is slow or short, and the hardness is not low.
is the best, and the work of grinding is also not low. Fine grinding can make the product good and the body smooth. Coarse grinding to grinding, and gradually make the product the best. The grinding stone needs to be combined, and the force also needs to be uniform, so that it can be profitable.