4-pyridinemethanol

The flintlock of the sun is known for its ability to make fire in the sun, and its nature belongs to the sun. Its quality is mostly copper, which is like a mirror, smooth and shiny.
The characteristic of the flintlock of the sun is that it focuses the sun. When the sun is placed under the sun, the light is irradiated on it, and it is reflected and converged by its curved surface, and it can be concentrated at one point. At this point, the temperature gradually rises. If you place something flammable, such as moxa velvet, at this point, after a while, the moxa velvet can ignite a flame. This is the wonder of the sun's flintlock to make fire. It depends on its ingenious convergence of light. It uses the sun's yang energy to make fire. The ancients often made fire in this way, which is great for life. < Br >
Also looking at the properties of its material, copper is tough in texture, and has good thermal conductivity and corrosion resistance. The copper-cast yang flintlock can be preserved for a long time without losing its usefulness. Its surface is smooth, so that the light can be reflected accurately and focused effectively. If the surface is rough, the light will be scattered, and it will be difficult to converge into a high temperature point enough to make a fire.
Furthermore, the shape of the yang flintlock is mostly round. In the ancient concept, the circle symbolizes perfection and repetition, which is in line with the principle of the cycle of heaven. And the round body is more favorable than other shapes in collecting light, so that the light can be evenly reflected and concentrated in the center.
The physical properties of the sun flintlock, focusing on fire, the material is tough and smooth, and the shape is round and mellow, all of which reflect the ancient people's insight into the physical properties of nature. They created this object with ingenuity, bringing many conveniences to life, and also demonstrating the wisdom and skills of the ancients. It is really one of the wonders of ancient technology.

Mercury has a unique chemical nature. It is a liquid among hardware, shining brightly at room temperature, like a silver bead flowing, one of which is also. Its boiling point is quite low, only 356.7 degrees Celsius, and it turns into mercury vapor when heated slightly. It floats in the air, and this vapor is invisible and colorless, but it is toxic. It quietly arrives, hurting people and being invisible. It is the second reason.
Mercury has a strange solubility and can dissolve with many metals to form amalgam. Precious metals such as gold and silver can be mixed with mercury. This characteristic has been used in ancient times, such as ancient alchemy, which often uses mercury to extract gold. In addition, the chemical activity of mercury is more active, although it is relatively stable at room temperature, when it encounters strong oxidants, such as concentrated nitric acid, concentrated sulfuric acid, etc., it reacts violently and converts into mercury salts.
Mercury compounds also have different properties. Mercury oxide, divided into red and yellow variants, is easily decomposed into mercury and oxygen when heated; mercury chloride, a highly toxic substance, dissolves very little in water; mercury sulfide, red in color, commonly known as cinnabar, is stable in nature and is a commonly used pigment in ancient times. It is also used for medicinal purposes. Mercury and its compounds are used in various fields such as industry, medicine, and scientific research. However, their toxicity cannot be underestimated. If they are not properly disposed of, they can flow into the environment and become bioenriched, which will eventually endanger human health. Therefore, when using mercury, it is necessary to be cautious to prevent its poisoning from developing.

4- What is the main use of the armor?
"Tiangong Kaiwu" has a saying: "Where the armor is, so the body is also protected." The primary use of the armor is to protect the body. In ancient times, there were frequent battles, and the soldiers faced each other, so the armor became the key for the soldiers to defend against the enemy.
The armor is made of tough materials, such as leather, metal, etc. The leather armor is mostly made of cowhide, rhinoceros, etc., which has a certain degree of flexibility and can cushion the power of weapons. Metal armor, such as copper armor and iron armor, is more strong and can effectively resist the thorn of swords, guns, and halberds. On the battlefield, arrows fly, sharp blades are exchanged, and the armor is wrapped around the body, which is like building a line of defense, greatly reducing the risk of physical injury.
In addition, the armor is used to protect the body, but also has the effect of strengthening the military prestige. Neat and fine armor, worn on the soldiers, shows dignity and solemnity. In the array, the armor shines, which can make the enemy fearful and demoralize. This is the help of armor on the psychological level, and it is also one of the important uses.
And armor also symbolizes status on some occasions. Soldiers of different levels have different shapes, materials and decorations of armor. The armor of senior generals or inlaid with gems, gold and silver and other ornaments is more exquisite in craftsmanship to highlight their noble status and outstanding combat achievements. This is not only a symbol of rank distinction, but also inspires soldiers to fight bravely and pursue higher honors.
Armor played a crucial role in protecting the body, strengthening the military's prestige and symbolizing status in ancient military activities.

If you want to make a female sword, there are three ways.
First, take the essence of hardware, choose a good time, and set up a furnace in the deep valley and forest to refine alchemy. First, it is based on fine iron, followed by the genera of copper, tin, lead, and mercury, according to the principle of five elements. The middle of the furnace is lit with spiritual fire, and the fire needs to be continuous, slow but not impatient. When the hardware is melted into a liquid, pour it into a special sword mold. The sword mold needs to be carved with thousand-year-old cold jade before it can condense its essence. When casting a sword, you need to hold your breath and have no distractions in your heart, and use your own essence to nurture the sword embryo. In seventy-seven or forty-nine days, the sword will become a embryo.
Second, find the most yin things in the world, such as the ice of the cold pool of the Netherworld, the saliva of the mysterious snake in the dark night, and the dew of Ganoderma lucidum in the ancient tomb. Immerse the sword embryo in it for a period of 100 days. During this period, at every hour of the day, the secret method is used to practice, attracting the yin qi of heaven and earth into the sword. When the yin qi enters the sword, the sword body is dim light, which is a sign of the fusion of yin qi. After a hundred days, take out the sword embryo and quench it with the snow water of the Tianshan Mountains. When quenching, you need to recite a spell to nourish the sword with the soft power of heaven and earth, so that it can be tough and not lose agility.
Third, when the sword body is first formed, you need to find a destined person for the sword. This person should The sword holder feeds the sword with his own qi and blood. In the seventy-seven and forty-nine days, the sword and the main heart are connected. Since then, the female sword has achieved great success.

If you want to know the attention of all things in storage and transportation, please listen to me carefully.
In the storage section, the temperature and humidity of the environment are the first priority. If the temperature and humidity are uncomfortable, or cause it to deteriorate and rot. It should be placed in a cool and dry place, away from direct sunlight, to prevent it from being roasted at high temperature and causing product variation. And pay attention to ventilation to circulate the air, so as to avoid mildew due to moisture stagnation.
Furthermore, the storage place should be clean and free of filth, away from the source of odor. It is sensitive and easy to stain other smells. If it is in the same place with odor, it may damage its original taste and quality.
As for transportation, stability is essential. The road is bumpy, and if it is not placed stably, it is easy to cause collision damage. It should be properly packaged or lined with soft objects to protect its integrity.
The choice of means of transportation should not be ignored. It is necessary to choose according to its characteristics. If you are afraid of cold, you should choose a warm car; if you are afraid of heat, you should carry it with a device that can control the temperature.
And you should move quickly during transportation to avoid long delays. For a long time, it may change due to time, resulting in poor quality. When driving, drivers should also be cautious, driving slowly, preventing sudden brakes, sharp turns, etc., to avoid damage to the contents.
To sum up, all of the above are essential for storage and transportation, and they must not be slack to ensure their integrity.