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Mercury is one of the hardware. Its nature is fluid, liquid at room temperature, silver-white and metallic luster. Mercury was widely used in ancient times.
First introduced in the way of alchemy. The ancients believed that the elixir of immortality could be refined through alchemy, and mercury was often the key thing in it. Alchemists believed that mercury had magical properties, and it could be combined with many gold and stone things, or it could make pills have extraordinary effects. For example, there are many records of alchemy in Ge Hong's "Baopuzi Nei". Mercury often participates in the reaction, and wants to use its characteristics to achieve the purpose of alchemy. However, its efficacy has no scientific basis and is mostly an illusion.
Furthermore, it is also used in the field of medicine. In ancient medical texts, mercury is occasionally mentioned as a medicine for treating scabies, acne and other diseases. For example, the "Shennong Materia Medica" lists mercury as a middle grade, saying that it is "the main scabies, fistulae, scabs, ulcers, baldness, killing lice in the skin, abortion, heat removal, killing gold, silver, copper and tin poisoning". However, at that time, there was a lack of understanding of the toxicity of mercury. Although it may have a certain effect, long-term use is prone to mercury poisoning, which is harmful.
In addition, mercury was also involved in the production of ancient handicrafts. For example, the gilding process, often made of mercury and gold amalgam, applied to the surface of the utensils, heated to evaporate the mercury, and the gold was left on the utensils to form a gilt effect, making the utensils more beautiful and gorgeous.
In some ancient sacrifices and rituals, mercury was given mysterious meaning because of its unique form and properties, and became one of the ritual items. However, it should be known that mercury is very toxic, and long-term exposure is extremely harmful to the human body. Although the ancients used it, they did not fully understand its harm.

Lead and mercury are the most important materials in alchemy. To synthesize lead and mercury, the ancient recipes followed the following methods.
First, start with lead, so that it can be refined together with sulfur. "Baopuzi Inner Chapter" says: "Lead is white in nature, and red is Dan; Dan is red in nature, and white is lead." First place lead in a crucible, heat it with charcoal, and wait for it to melt into a liquid, and slowly add sulfur. Sulfur meets lead liquid, and it reacts to form lead sulfide. This process requires careful temperature control. If the fire is fierce, the sulfur is easy to evaporate, and if the fire is small, it is difficult to synthesize. After repeated refining, removing its impurities, a purer lead sulfide can be obtained.
Second, the synthesis of mercury is often derived from Dan sand. In the case of Dan sand, mercury sulfide is also. The "Shennong Materia Medica Classic" lists Dan sand as the top grade. The ancients picked Dan sand and placed it in a closed cauldron and heated it at a suitable temperature. When Dan sand is decomposed by heat, the mercury sublimates and comes out, condenses in the upper part of the cauldron, and collects it with a special tool to obtain mercury. In this process, both the heat and the degree of airtightness are key. If the heat is insufficient, the decomposition of Dan sand is not complete; if the cauldron is not well sealed, the mercury is easy to dissipate, resulting in the synthesis failure.
Third, to obtain lead amalgam, it is necessary to place the refined lead and mercury in a container according to a specific ratio, heat it moderately and stir it. Lead and mercury blend to form an alloy. However, the proportion is extremely important. Different proportions make different alloys, whether hard or soft, and have different uses.
The technique of synthesizing lead and mercury was a core skill for the ancient alchemists. However, the process is complicated, and lead and mercury are toxic. If the operation is careless, it is easy to cause poisoning. Although the alchemists may not have fully understood the harm at that time, the study of the synthesis method also left precious experience for the development of later chemistry.

Lead and mercury are the ingenuity of hardware, the finest of heaven and earth. Its nature is hard and dry, its quality is contained in Kunshun, and it is the ancestor of all treasures and the foundation of all things.
Lead, black in color and water, is the key in the hexagram. Its shape is thick and heavy, and it contains the essence of true unity, and it should be the qi of the north. The nature of lead is heavy and moist, soft and strong, flowing in case of fire, condensing in case of water. Its changes are endless, and it can be combined with all things to form the foundation of great Dan. The Dragon and Tiger Sutra says: "Lead is the master of hardware, the river cart in the north." It is said that it is the first of all things, and it can transfer yin and yang and mediate creation.
Mercury, white in color and of gold, is dry in hexagrams. It is light in nature, agile and lively, like the change of clouds and mists, like the impermanence of water flow. Mercury often wants to soar, but rises in case of fire, and can penetrate the sky. However, although its nature is dry, lead can be made when it is obtained, and the two need each other. It is an essential medicine for alchemy.
The nature of lead and mercury is one yin and one yang, one static and one moving, sympathetic to each other, and only changes. Lead is the house of mercury, and mercury is the master of lead. Lead can make mercury soar, and mercury can emit the brilliance of lead. If it is reconciled with heat and combined into one, it can return the original and return the yuan, and achieve the golden pill avenue.
The ancients said: "Lead and mercury are congenial, just like the cooperation of husband and wife, the intersection of yin and yang." The combination of lead and mercury is not something that human strength can do, and it must be transformed by the way of nature. When you stay together with your spirit, your thoughts and concerns are silent, and you can automatically combine lead and mercury in nothingness, you can get its true beauty. The physical properties of the two are interdependent, mutually restricting, and changing thousands of times. They are the cardinal of alchemy, the foundation of immortal cultivation, and the most secret treasure between heaven and earth.

Lead and mercury are also the genus of hardware. Lead is blue and gray in color, soft and heavy in color, and has a heavy nature. At room temperature, its shape is stable, but when it encounters fire, it melts and turns into a liquid, and its quality is warm and flowing. Lead is slow in nature and combines with other objects, often responding to it with a calm trend. In the alchemy, lead is often the elephant of yin, with the power of convergence and condensation. If it is combined with mercury, it can become a wonderful change.
Mercury, commonly known as mercury, is silver-white in color, liquid at room temperature, flowing freely, agile and lively. Its nature is yang and lively, good for volatilization, and when heated, it rises into qi, changing rapidly and elusive. Mercury has the ability to penetrate and penetrate. Although it is a metal, it is amorphous. It is often referred to as the elephant of yang. In alchemy, its agility makes it cause many subtle reactions when it combines with lead and other substances.
The two of lead and mercury are contrary to each other. The stability of lead can make mercury agile, and the vitality of mercury can initiate the condensation of lead. In the practice of alchemy, the ancients observed the wonders of its synthesis. If lead and mercury are used as the basis, supplemented by other medicines, and the temperature is controlled, the medicinal pill can be refined. The combination of lead and mercury cannot be achieved overnight, and it needs to be patiently reconciled and conform to its properties. If the heat is too high, mercury is easy to evaporate and lose; if the heat is not enough, lead and mercury are difficult to melt. The transformation of lead and mercury is like the way of yin and yang, which checks and balances each other and transforms each other. In all things in nature, the nature of lead and mercury is hidden in it. Observing the nature of the two can provide insight into the opportunities of creation in heaven and earth, explore the principles of material change, and open a door to understand the wonders of nature and pass through the mysteries of change.

Those who are in possession of Tibetan animals and those who transport armor sharks should be aware of the importance of all things.
Tibetan animal armor sharks are the first environment. Their sex likes shade and dampness, so they should choose a secluded and moist place to avoid the dry sun. If placed in a place with high sun, armor sharks are prone to fatigue and disease. Their dwelling place should be covered with bricks and stones, forming a cave shape for them to hide, just like a natural environment. Water needs to be prepared, but the water should not be too deep, and the back of the diffuse armor sharks should be the degree, and the water must be changed frequently to keep it clear. If the water quality is dirty, the armor sharks will be stained with disease.
As for the transportation, there are also all kinds of attention. Before setting out for transportation, feed it slowly, do not make it full, so as to avoid vomiting on the way. Wrap its body with wet grass to keep it moist, and do not make the skin dry and cracked. In a bamboo cage, the size of the cage is suitable for the armor shark to turn around. If it is too large, it will be turbulent on the way, causing it to be uneasy; if it is too small, it will be restrained and damage its body and skin. On the way, avoid the hot sun and strong wind, and do not slow down. If it is exposed to the sun for a long time, or attacked by strong winds, the armor shark's qi and blood will not be smooth, and it is easy to cause changes. And for a few miles in each row, when you check it, you should observe its condition. If there is fatigue or injury, you should deal with it quickly.
Tibetan animals and transporting armor sharks, although it is not difficult, but Therefore, it is necessary to pay close attention and do it carefully, so that the sharks can be safe.