Pyrazine, amino-

Those who rely on it, its main cost is related to many aspects. In agriculture, the seeds depend on it for nourishment, so that they can break through the soil and germinate, grow into strong seedlings, and then bloom and bear fruit. This is the foundation of harvest, which is related to the food of all people. In the work of craftsmen, all kinds of equipment need to be maintained in order to accurately cut, shape, and achieve exquisite utensils to meet the needs of people's livelihood.
In marching and fighting, the physical maintenance of soldiers and the sharpening and maintenance of weapons depend on it. If there is no reliance, the soldiers will be exhausted, the weapons will be dull and difficult to use, and the war will be defeated.
In the palace construction, the processing of wood and the masonry of masonry all need to rely on. The craftsmen used this to turn the materials into magnificent palaces and sturdy pavilions, so that the kings could live and govern in peace, and also provide shelter from the wind and rain for the common people.
In the circulation of commerce, the transportation of goods and the calibration of the balance of transactions all depend on it. To ensure fair trade, the smooth circulation of goods, the accumulation of wealth in the four parties, and the promotion of economic prosperity.
And relying on learning and study is also indispensable. Students who read classics need lighting and warmth in cold nights to concentrate on learning, inherit culture, and cultivate talents.
In short, the use of reliance runs through everything, and it is a key factor in the fields of people's livelihood, military, construction, commerce, and culture. Without it, everything is difficult to achieve, and society does not function smoothly. Therefore, it plays a pivotal role in all things in the world and is the fundamental support for everything to go smoothly.

Yang Ke, Yongji's physical properties are as follows:
Yongji's are hard and firm, like gold and stone, indestructible. Touching it, it feels cold, like the frost of a cold night. Looking at its color, it is often dull, or gray or brown, just like the color of precipitation over time.
When placed in a fire, although it has been burnt for a long time and is difficult to melt, it seems to be able to resist the invasion of fire. When hit with a hammer, it leaves only light marks. It is as strong as ever, and cannot be easily broken.
Its density is quite large, and when held in the hand, it feels extremely heavy, several times heavier than ordinary things. If thrown into water, it will quickly sink to the bottom of the water, not floating or floating.
As for its malleability, it is quite limited. If you want to make it thin, although you apply force, it is difficult to achieve your wish. It can only change its shape slightly, and it cannot be extended as freely as gold and iron.
And its conductivity of electricity and heat is not significant. Therefore, it conducts current, but it is difficult to pass current; it is difficult to transfer temperature and heat, as if it is isolated from electricity and heat.
Furthermore, there is no significant change in Yongji when it encounters acid and alkali. If it is leached in acid and soaked in alkali water, it has no corrosion on the surface, and its quality remains unchanged. It seems to be able to resist all kinds of chemical erosion.
The physical properties of Yongji are hard, heavy, refractory, and difficult to develop. They are unique in terms of electricity, heat, and chemistry, and are completely different from others.

The chemical properties of Yongji are as follows:
Yongji, whose properties are flat and stable, is not easy to react violently with other things under normal conditions. At room temperature and pressure, it is solid, dense and firm in texture, with a metallic luster, shining brightly. Its melting point is quite high, and it needs an extremely hot temperature to melt. This characteristic makes it possible to maintain its shape under high temperature conditions, and it is not easily changed by heat.
Yongji encounters strong acids and bases, and the reaction is slow. Strong acids such as sulfuric acid and hydrochloric acid drop on it, and only slight bubbles escape, and the reaction speed is extremely slow, not as violent boiling and rapid dissolution as other lively metals. Even if it is co-placed with strong bases such as sodium hydroxide, there is no significant change, and only after a long time, the surface shows a slight change in color, or a very small amount of material is formed.
However, before the strong oxidation agent, the permanent base is not completely indifferent. In case of concentrated nitric acid, and heated, the permanent base gradually reacts with nitric acid, and the surface is eroded to form corresponding salts. At the same time, reddish-brown nitrogen dioxide gas escapes, which is pungent, colorful and eye-catching.
In the air, the permanent base is very stable and is not easily eroded by oxygen and water vapor. Over the years, it is difficult to see the appearance of rust, only the surface or due to years of rubbing, dust staining, slightly lost the original luster, but its essence has not changed, still retaining its inherent quality.
And always based on a specific catalyst and under suitable temperature and pressure conditions, it can react with some non-metallic elements. In case of high temperature chlorine gas, yongji can react with chlorine to form chlorides, which have specific chemical and physical properties and may have different uses in the field of chemical industry.

Those who are good at asking, if you decide on rivers and rivers. Dare to ask the "Yongji -" mentioned by your Excellency, I don't know what it means, but I hope you can make it clear so that I can answer accurately. However, there are many records in ancient books about the synthesis of common things, and let me briefly describe one or two ancient methods.
If it comes to the synthesis of gold and stone, among the ancient methods, there are many methods of refining with alchemy furnaces. If you want to refine the essence of hardware, you need to find high-quality ores, use charcoal as fire, and control their heat. At first, the fire should be slowed down, so that the ore will gradually melt and remove its impurities; then the fire will become fierce, so that all things will blend. In this process, according to the nature of the ore, it is necessary to add medicine at the right time, or for the ash of plants and trees, or for the water of spiritual springs, in order to make the synthesized thing pure.
As for the synthesis of plants and trees, there are also wonderful methods. If making good medicines, it is often necessary to collect all kinds of herbs, put them in a clean room, and match them in a certain proportion according to their taste and scripture. Or pounded into mud, or fried into juice, or baked as the end, and then used honey as a pill, or sealed in a porcelain bottle. During this period, it is also crucial to control the time and temperature, and the difference is very small, which is thousands of miles away.
Another example is to make silk, first raise spring silkworms, wait for them to form cocoons, and choose the best one. Soak the cocoon in warm water, extract the silk strands, and gather the strands as threads. After the dyeing process, take natural color materials, such as safflower, bluegrass, etc., boil into juice, immerse the silk threads, and dye the desired color. Then put it on the machine to weave, interweave the warp and weft, and form silk.
Another example is firing ceramics. The selection of soil is quite critical. It is necessary to choose delicate and good cohesive soil, and wash away the sand and gravel. After making the billet, dry it in the shade, and then enter the kiln for firing. The temperature of the kiln and the length of the firing time all affect the texture and color of the ceramics. During firing, either glaze or carve to decorate, making the ceramics exquisite.
However, there are many ways to synthesize things in the world, and with the changes of the years, new methods have also come out. The above is only a corner of the ancient methods, and I hope it can solve your confusion.

Good, what the inquirer inquires, is what domain does Yongji's use involve. Let me explain it in ancient words.
Yongji is used in the work of civil engineering. When building palaces, Yongji must be relied on to solidify its foundation. "Kaogong Ji" says: "For every palace, a foundation site must first be established." If the foundation is not eternal, the house will be difficult to rest. Yongji's quality is firm and solid, and it can support thousands of buildings, so that the wind and rain will not invade, and the years will be safe. Looking at the palaces and pavilions of ancient times, those who have not fallen after a thousand years are also the achievements of Yongji.
In the business of water conservancy, it is also indispensable. Building dikes and weirs, repairing ponds, Yongji can guarantee its long-term stability. In the past, Li Bing controlled water, at the foundation of Dujiangyan, using the method of Yongji, using bamboo cages to hold stones, and sinking at the bottom of the water, as the foundation of the weir. This foundation has been initialized by the water flow for thousands of years, and it is still stable, so that the land in western Sichuan is fertile, and there are droughts and floods. If there is no Yongji, the floods will continue frequently, and how will people's livelihood be safe?
Furthermore, in the construction of roads and bridges, Yongji is the most important. The journey of the avenue, the bridge spans, and Yongji is the foundation of its bearing. The ancient plank roads, the passageways of today, are all paved with Yongji. Make vehicles, horses and pedestrians come and go like a flow, and travel unimpeded. If the foundation is not permanent, the road will collapse, the bridge will collapse, the traffic will be blocked, and the commerce will be difficult to flourish. < Pavilions, rockery ponds and marshes all depend on Yongji. Yongji is the support of the scenery, so that the beauty of the garden can last forever. Tourists can come here to enjoy the scenery of the four times and feel the time.
From this point of view, the use of Yongji involves a wide range of fields such as civil engineering, water conservancy, roads and bridges, and gardens. It is the foundation of all things, related to the rest of the people's livelihood, and the rise and fall of the community. Make good use of Yongji, and all things can be accomplished and the foundation can be solidified.