5-(5-Bromo Pyridine)-Tetrazole

The main purpose of the four rivers is to drain the flood, so that the water flow will not be overflowing.
"Heavenly Works" says: "The method of governing water is not good at dredging." The purpose of the four rivers, which are artificially created, is to disperse the water, and to introduce more water into other rivers to ensure the safety of one party.
In the past, every time there was a rainstorm, the rivers overflowed, and the fields and houses were often invaded by floods. And the four rivers are like human blood, which can lead the flow of water, so that it can follow its own path, so as not to be ravaged by the flow. For example, in the place of water in the south of the river, the four natural rivers are connected, forming a complete water system. In drought, river water can be diverted to irrigate the fields, so that the crops can be harvested; in drought, the water can be discharged quickly to avoid the fields being flooded and the people being trapped.
In addition, the four walls are also conducive to transportation. Because it connects different waters, boats can use this to pass, promoting the ease of transportation in various places, so that the goods can be circulated and the water can be proliferated. And the four banks often become a place for residents to live. Because of their abundant water sources and convenient transportation, they form markets and cities, promoting cultural exchanges.
In addition, the four walls play an important role in water regime, irrigation of fields, and transportation facilitation. They are the crystals of the wisdom of the ancients in water management and the development of the community.

The five desires system (the five desires to make mercury), the four mercury combined into various methods. The method can refer to the gist of "Tiangong Kaiwu", which is described in ancient methods.
First, start with Dan Sha. For Dan Sha, the original quality of mercury is also. Take Dan Sha and place it in airtight tools, and apply heat. At first, the heat slows down, so that the Dan Sha gradually softens and melts. Then the martial fire is fiercely calcined, and the mercury in it is driven by a hot topic and turns into steam. A condensing device is placed above, and the mercury vapor is cooled, condenses into a liquid, and gathers in one place. This is the common method of mercury refining in ancient methods.
Second, lead and mercury are mixed. Lead sedimentation, mercury flow. Melt lead into a liquid, pour mercury into it, and mix the two. Lead and mercury meet, and combine into one. However, if you want to get pure mercury, you need to be treated again. This lead-amalgam can be placed in a furnace and heated on low heat. The boiling point of lead is higher than that of mercury. Mercury is first converted into steam to escape, and then condensed by condensation to obtain relatively pure mercury.
Third, with the assistance of alumite. Alumite, sulfur-containing and other substances. Mercury and alumite are co-placed in a device and heated. Alumite is thermally decomposed to release sulfur, which is combined with mercury to form mercury sulfide. If you want to get more mercury, you can heat the mercury sulfide with oxygen, sulfide it into a gas to disperse, and the mercury is re-reduced.
Although the methods of mercury refining are different, they all need to observe the heat and be familiar with the physical properties. If the heat is too high, the mercury will easily disperse; if the heat is not high, the mercury will be difficult to precipitate. And all operations should be done in a well-ventilated place to prevent mercury poisoning. This is a brief description of the method of five-desire mercury production and tetramercury synthesis.

Sodium tetraborate, commonly known as borax, has unique physical properties. Borax is usually in the state of colorless translucent crystals or white crystalline powder, and the texture is relatively fine.
Borax can be slowly weathered in air, which is one of its major characteristics. It is very soluble in water, and its solubility is more considerable in hot water. When dissolved, the aqueous borax solution is alkaline, and this chemical property interacts with many substances to give rise to different chemical reactions.
Borax has a high melting point and requires a higher temperature to melt. When borax is heated, it will gradually lose its crystal water and change its shape. After reaching a certain temperature, borax will melt into a glassy substance. This glassy substance has good thermal and chemical stability and can be used in many fields.
Borax has a clean appearance, no impurities mixed in it, and a smooth touch. Due to its unique physical properties, borax is often used as a detergent and preservative in the industrial field; in the glass manufacturing industry, it can enhance the thermal stability and transparency of glass; in ceramic production, it can improve the properties of ceramics. In the field of traditional Chinese medicine, borax also has certain medicinal value. The unique physical properties of borax make it play an important role in many aspects and play an indispensable role in human production and life.

In today's world, the hardware market comes from all over the world, and merchants gather. As for one of the hardware, called "Four Nails", its market price is quite concerned by everyone.
The market of Guanfu City, the price of four nails is not static, and often changes due to many reasons. First, the price of raw materials is the key. If the iron, steel and other raw materials it relies on rise or fall in price due to the abundance of mineral sources, or the difficulty of mining and smelting, the cost of four nails will change accordingly, and the market price will also be affected. For example, if iron sources are scarce, mining and smelting are difficult, and the price of raw materials rises, the price of four nails will also rise.
Second, the supply and demand of the city determines its price. If civil engineering is prosperous and there are many people building houses and roads, the amount of four nails required will surge, and the demand will exceed the supply, and the price will rise. On the contrary, if the construction is sparse, the demand is few, and the supply exceeds the demand, the price may be in a downward state.
Third, the government's measures also affect the price. If the government adopts tax adjustment and regulation policies, it will have an effect on the production and sales of four nails. Taxes increase, business costs increase, and prices may increase; regulations are loose, and the production system is convenient, or the supply may increase, and prices may stabilize and decline.
Fourth, the situation in the world also has an impact. The four sides are turbulent, transportation is blocked, goods cannot flow smoothly, and prices may fluctuate; the four seas are rising, and commerce is smooth, and prices may be stable.
To sum up, the market price of the four nails often changes due to factors such as raw materials, supply and demand, political initiatives, and the world situation. Businesspeople need to be aware of the current situation and be aware of the situation in order to make profits in the market and avoid all kinds of risks.

It is necessary to pay attention to the four things that need to be hidden.
It is also the first important situation to hide. It must be a busy place, if it is a place where the tide is, it is easy to suffer from trouble. For example, it is better to be good in transportation, and it is better to be good in water, so that the four things can be guaranteed. And the degree also needs to be high, and it is easy to make the four leaven and lose its original flavor; it is low or cause it to be damaged. It is generally appropriate to keep the degree in the middle, so that it can be the best.
Furthermore, the method of wrapping is very important. With the right materials, properly wrap the four pieces to prevent them from being collided and broken during the bumpy road. On the way, you should also pay attention to avoid severe earthquakes. If you walk on mountains and roads, or encounter rough roads, you need to be careful. If you leave it for a long time, you should check the surface of the four walls regularly to prevent any unnoticed damage.
Also, the equipment of the warehouse also needs to taste good. If the equipment is dirty or has a smell, it is easy to dye the surface of the four walls, and it will lose its original fragrance. Moreover, if it is dirty, it should not be damaged, and there should be no space left, so that the four walls will not be damaged with each other.
When it comes to the handling of people, it is necessary to be careful to hide it. Don't be careless and cause the four walls to suffer. Only by taking care of such things and taking care of the heart can the four things be hidden, preserving their integrity and flavor, so as to save the world.