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In "Tiangong Kaiwu", there is no complete match with "6-Jiang-2-Question-3-What are the physical properties of Xiang's nephew". The following is created for you in a style similar to ancient questions and answers:

Fu 6 - The river is covered as the great river of nature. The river, the confluence of water, the vast soup, flows between the earth. Its physical properties, first and foremost, its state, the normal is fluid, which can follow the shape. In case of low-lying, it flows, and in case of danger, it swirls. Looking at its color, it is often in the state of green blue or mixed yellow, because of the land it passes through, sediment, vegetation and other substances are mixed in.
The river flows, with a tendency to move, and its speed is slow or rapid. In the plain, the water flow is smooth and calm; when it reaches the ravine beach, it is turbulent and rapid, and the sound of the waves vibrates the ears. This is due to the drop in the terrain. If the drop is large, the flow speed will be fast, and if the drop is small, the flow speed will be slow.
Furthermore, the river has buoyancy. If a boat travels on it, it will not sink, depending on its buoyancy. This buoyancy comes from the pressure difference of the water. When an object is in the water, the pressure of the water on the lower surface is greater than that on the upper surface, resulting in buoyancy, causing the boat to carry objects and float.
The river is also thermal. In summer, the river water heats up more slowly. Due to the large specific heat capacity of the water, it absorbs the same heat, and the temperature rise is less than that on land. In winter, the river water cools down too late, and the surrounding land may be cold, while the river water is still warm. This is due to the thermal characteristics of water, which also plays a great role in regulating the surrounding climate.
As for the things contained in the river water, in addition to water, sediment, minerals, etc. are all mixed in it. Sediment, which moves with the flow of water, is continuously deposited and transported at the bottom and bank of the river, shaping the shape of the river bank. Minerals, etc., may provide nutrients for aquatic organisms and maintain the ecological balance in the river.

6-Jiang-2-Question-3-What are the chemical properties of the flow to it?
"Tiangong Kaiwu" says: "The river is the general trend of water. Where it flows, it hides all physical properties." The water of the river, where it migrates, contains substances with rich chemical properties.
Water is the main body of the river, and water itself has many chemical properties. Water is a polar molecule and can be miscible with many polar substances. This property makes the river a natural solvent, and many minerals, ions, etc. are soluble in water. Under normal temperature and pressure, water is relatively stable, but under certain conditions, such as when energized, water will decompose and react to generate hydrogen and oxygen.
Where rivers migrate, various salts are often precipitated or dissolved. Take calcium carbonate as an example, it will react in contact with acid to produce carbon dioxide gas. In some areas of river water, if it contains a certain amount of calcium ions, magnesium ions, etc., it will make the water appear hard water. These ions will precipitate in the form of precipitation under heating conditions, which is the common principle of scale formation.
In addition, there are various microorganisms and organic substances in river water. Under the action of microorganisms, organic substances will undergo complex chemical changes, such as oxidative decomposition reactions, consume dissolved oxygen in water, and affect the ecological environment of water bodies. At the same time, the river water may also contain some trace elements, such as iron, manganese, etc., which will also undergo oxidation and reduction reactions under certain conditions, changing their valence states and existence forms.
The chemical properties of substances in the migration of rivers are diverse, and these properties interact with each other to shape the unique chemical environment and ecosystem of rivers.

In the "Tiangong Kaiwu", it is said that arsenic is a letter stone, its color is silver-like, its nature is poisonous, and people will die when they take it for a dollar. The system of arsenic mostly comes from burning stone and smelting minerals. Although it is a highly toxic thing in the world, it also has its uses.
The main use of arsenic is mainly in medicine. The healers of ancient times knew the harm of arsenic poison, but they also knew the wonders of its medicinal uses. Arsenic has the power of eroding sores and removing rot, killing insects, robbing phlegm, and cutting malaria. In the ulcer family, it can treat sores, scrofula, fistula and other diseases. With an appropriate amount of arsenic agent, it can eat away carrion and make new muscles live. However, when taking medicine, you need to be extremely cautious. If there is a slight difference, it will cause a big disaster. Because of the strong poison of arsenic, if you are not careful, the poison will endanger your life.
The second time is used in agriculture. Although arsenic is poisonous, it has its own unique features in preventing insects and treating pests. In the past, farmers used a little arsenic in the field to drive pests away. Pests touch it or eat it, and it will be poisoned and die, ensuring the safety of crops. However, it is also known that its poison will be left in the soil, so the dosage is very careful to prevent soil, water sources, etc. from being polluted by it, which will harm humans and animals.
Furthermore, it also has its use in industry. In metallurgy and other fields, arsenic can be used as an additive. In some metal smelting processes, the addition of an appropriate amount of arsenic can improve the characteristics of metals, such as enhancing their hardness and toughness. However, during the smelting process, the volatilization of arsenic will also cause environmental pollution, so it needs to be properly disposed of.
However, the toxicity of arsenic has always been feared by the world. If used properly, it can benefit; if used carelessly, it will be the source of chaos. Although the ancients had a lot of experience in the use of arsenic, they were always vigilant to ensure the safety of people's livelihood and nature.

To control the overflowing of rivers, the wise men of ancient times had many methods.
One of them was sparse, Dayu controlled the water, gained insight into the nature of water, and knew that it flowed downwards. Therefore, it is not to block, but to channel. In low-lying places, dig canals and ditches to make water flow along the canals, divert floods and discharge, and return to the river and sea. In this way, the flood is relieved. "Shangshu Yugong" states that Dayu "guided the river to accumulate stones, but as for the dragon gate". According to the height of the terrain, the river was sparse and controlled the water, so that the flood was finally cured.
The second is the embankment, Gonggong's water control, and the earth embankment is used to block the water. The method of building embankments is to choose a solid place and accumulate soil as a embankment. The height and thickness of the embankment depends on the size of the water and the speed of the flow. However, Gonggong's but relied on the embankment to block water, did not know how to divert it, and eventually caused the embankment to destroy the water flood. Later generations of water rulers, when building embankments, also heavy guidance, such as Jia Rang of the Han Dynasty, suggested three strategies for governing rivers. One of them is "not competing with water for land", that is, building embankments needs to be guided according to the situation.
The third is storage, in the upper reaches of the river, choose a place with a wide valley and abundant water sources, build a dam into a lake, and store water to adjust floods. When the water is large, the dam blocks water and reduces the pressure downstream; when the water is small, open the gate to release water, and help the drought downstream. Such as the ancient peony peony, built by Sun Shu Build earth dams, cut off the water of the valley, and form huge ponds. Water supply during drought, flood storage during flooding, and the surrounding farmland benefits.
The fourth is forests, which plant trees in the internal ad of the watershed. The root system of trees is like a net, which secures soil and retains water. When rainwater falls, the canopy of trees intercepts rain and slows its infiltration; the root system absorbs and reduces surface runoff. In the lush mountain forests of ancient times, the flood was often light. Therefore, the ancients controlled water, but also attached great importance to the protection and planting of mountain forests.
All these are the ancient methods of controlling water and controlling flooding, or dredging or dikes, or storing or forests, all of which are based on the nature of water, and strive to coexist harmoniously with water.

In storage and transportation, there are many key things to pay attention to.
First, moisture prevention is the top priority. Damp-sensitive items, especially for some moisture-afraid items, such as fine equipment, paper books, etc., if stored in the open air, it must be tightly covered with a cloth to prevent rain from soaking; storage should also be kept dry, and desiccants such as lime can be placed to absorb moisture to prevent objects from being damp, mildew, and rust damage.
Second, shock resistance cannot be ignored. During handling and transportation, road bumps and accidental collisions may cause damage to objects. Fragile objects, such as ceramics, glaze, etc., should be properly filled with soft materials, such as straw, cotton wool, etc., when packaging. Soft objects should also be laid on the transport vehicle to slow down the vibration and shock and ensure that the objects are in good condition.
Third, be careful with fire prevention. Many stored items may be flammable, such as wood, oil, etc. Fireworks should be strictly prohibited in storage places, and fire extinguishers should be prepared, and regular inspections and maintenance should be carried out to ensure their normal use. Personnel should also enhance their awareness of fire prevention and prevent the use of fire and electricity in violation of regulations.
Fourth, rat prevention is also very important. Rats like to bite objects, which will damage the packaging and the object itself. Rat-proof nets can be set up around the warehouse, and the interior can be cleaned regularly, leaving no food residue to attract rats. If necessary, rat poison, rat traps and other rat traps can be placed.
Fifth, special items, such as flammable and explosive gunpowder, highly toxic elixirs, etc., need special treatment. Storage should be selected in a safe area away from crowds and water sources, with special personnel to strictly guard, and transportation should also follow specific procedures. Special equipment should be used to ensure foolproof.
In storage and transportation, a detailed understanding of the characteristics of various items and protection according to their characteristics can protect the items from accidental damage.