The god of the four rivers, its use is good. The four rivers, rivers, huai, and mountains are also.
The river is the river, the flow of the water, the vast and vast, running in the river, connecting the sea and the river. There are three uses: one is to cultivate the fields, so that the people can have food. The ancient people lived by the river, and the river water was diverted to irrigate the fields, and the fertile fields were thousands of miles away. The two are the boats, which are easy to pass, and promote the way to the river. The river is deep, and the boats are feasible. The north is the north, and the north is the south. The colonization is prosperous, and the commerce is concentrated. The three are the nurturing of the river, the growth is the natural and the river. The river is full of, Prosperous, along the river are plants and trees, where things are resting.
The river is also the mother river of summer. Its water is like thunder. The function of the river is first to nurture civilization. In ancient times, the ancestors gathered along the river, farmed and multiplied, and created the summer culture. This time, irrigation of the Central Plains made the soil of the Central Plains fertile, and the harvest was clear. However, the river water is good for silting and good, and it is not a matter of governing the water in the next generation, but the people. However, the law of governing water can also be used to benefit, and the flow is sparse, and the embankment is fixed, and the people enjoy its benefits.
The water of the Huai River is also the water of the Huai River. Its flow is smooth, and there are many tributaries. The benefits of the Huai River are open to navigation in the irrigation field. Huainan and Huaibei, because of the Huai Water, mulberry and hemp are everywhere, and rice is harvested. And its waterways lead to the Huai River, which connects rivers and rivers, and the four-sided materials are sent from the Huai River, promoting the exchange between the north and the south. And the Huai River Basin, with its beautiful scenery and culture, breeds more songs and increases cultural prosperity.

Those who are in ancient times, the water of the ancient times, its source is clear, and it emerges from the flowing land. The water of the river is not as vast as the river or the river, but it is virtuous to the Qing Dynasty, and it flows into the sea, not with the flow and pollution. The use of water is also on the irrigation side, nourishing the people. And in the minds of the ancients, the water has the status of a god, a place of sacrifice, like a clear and upright, educating the people, so that the people advocate kindness and integrity.
Therefore, the four kinds of water, or the foundation of people's livelihood, or the foundation of culture, or the foundation of culture, or the principle of morality, its great contribution is indispensable to the world.

"Tiangong Kaiwu" Cloud: The four-pronged poles have unique physical properties.
The color of the four-pronged poles is mostly emerald, and occasionally yellow-green. Viewed in the field, it is like a jade hairpin scattered on the earth. Under the sunlight, it shines brightly, giving off the vitality and vitality of nature. Its color is fresh and bright, showing vigorous vitality.
In terms of its texture, the stem has four edges, and the edges are clear when touched by the hand, which is different from the common grass with round stems. The stem is solid and flexible. Although it is not as hard as gold and stone, it can be swayed slightly and continuously broken when a strong wind strikes. This tough quality makes it survive in harsh natural environments.
Furthermore, the smell of the four-edged penny, close to the smell, has a clear grassy fragrance, like the coolness of mint, and contains a unique wild gas, which makes people feel refreshed and refreshed.
Its touch, the leaves are soft and slightly fluffy, and the hand strokes it like stroking the hair of a young animal, delicate and warm. And the veins of the leaves are clear, and the texture of life can be felt by the fingertips.
The density of the four-edged penny is slightly heavier than that of ordinary weeds. When placed in the palm of your hand, you can feel its heavy weight, as if it carries the nourishment of the earth and the precipitation of the years. And its elasticity is also good. After bending, it can quickly return to its original state, like a dancer with a vigorous posture, showing its unique toughness and vitality.
These physical properties are all unique to the four-edged penny. In the world, with its own characteristics, it interprets the wonders of nature and the mysteries of life.

If you want to know about this, you can test its properties.
Four kinds of chemical substances are one of the most important materials and have a certain chemical activity. Under normal conditions, they can cause reactions to multiple substances. In case of acid, such as acid and sulfuric acid, it can generate high-quality and low-quality. This reflection shows that it has the typical properties of gold, that is, it can be placed in acid.
And in the air, four kinds of oxygen can slow down and form an oxide film on the surface. This film can prevent one-step oxidation to a certain extent, but it is not a guarantee. If it is in a humid and aerobic environment, its oxidation rate will increase rapidly, causing its properties to change.
Furthermore, the reaction of the four-dimensional system cannot be ignored. Under certain conditions, it can be reversed, generating phase and other substances.
Therefore, the transformation of the four-dimensional system is uncertain. It is possible to reverse the biochemical system in different environments and the connection of different substances. In some cases, it can be qualitative to a certain extent, such as the formation of an oxide film on the surface, then it is certain that it will not last for a long time. Therefore, its chemistry is determined, and it is difficult to cut it, and it is difficult to change it.

In the production process, all matters need to be treated with caution.
The first priority is to create an environment. The place where the workshop is located needs to be spacious, bright, and well ventilated. If you are in a narrow and dark place, the filth will accumulate, which will not only hinder the craftsmen's work, but also damage the utensils you make. "Kaogong Ji" says: "There is time in the sky, and the earth has gas, the materials are beautiful, and the workmanship is clever. If these four are combined, then it can be good." The "qi" in this place means the environment. Open and ventilated, so that the craftsman's mind can be clear and clear, and the utensils must also be well-ventilated.
The second is the selection of raw materials. Materials are the foundation of utensils, and quality is the best way to make a good utensil. The raw materials of the four seams should be carefully selected. Wood must be fine-grained and tough; clay must be delicate and pure, and the viscosity must be moderate. The materials selected must also be suitable for the use of the utensils. Such as food utensils, the raw materials must be non-toxic and harmless; for furnishings, the materials must be beautiful. Do not use inferior materials to damage the quality of utensils in order to save tariffs.
Furthermore, craftsman skills are of paramount importance. Craftsmen should be familiar with various techniques, and they should be handy in carving, shaping, painting and other processes. They need to practice hard and constantly improve their skills on weekdays. When imparting skills, seniors should teach each other everything, and younger generations should humbly ask for advice. The inheritance of skills is orderly, so that the level of utensils production can be stable and improved.
The production process should not be sloppy. From the initial design to the final product, every step must be carried out according to the rules. Each process is closely connected and must not be reduced at will. If pottery is fired, the control of the heat is extremely critical. If it passes, the utensil will be easily deformed and discolored, and if it is not good, the texture will be loose. And when making, you need to pay full attention and not be distracted. If there is a slight mistake, it may be destroyed in one fell swoop.
In the production process, all the details are related to the success or failure of the utensil. Sisei must pay attention everywhere to get a good work.

"Tiangong Kaiwu" says: "The people of the four directions all serve silkworms, and their benefits are pure." Today's bamboo in Sichuan is like the silkworm in ancient times, which is of great benefit to the environment.
Sichuan bamboo has a wide variety of species, covering mountains and plains, and has become a forest. Its contribution to soil and water conservation is the key. In the land of Sichuan and Shu, there is rain and water washing, and the soil quality is easy to lose. The root system of bamboo is intertwined and deep into the soil, like a strong net, binding the soil to prevent sand, so that the soil and water will not be lost. In the past, there were small towns in Shu, and the fields were reclaimed due to cutting bamboo, which caused landslides and destroyed the fields during heavy rains. Later, everyone planted bamboo, and in a few years, the water and soil gradually solidified, and the disaster was reduced.
Furthermore, bamboo purifies the air and has a significant effect. The leaves of bamboo have strong photosynthesis, absorb carbon and release oxygen, making the air fresh. In the densely packed bamboo forests in central Sichuan, negative oxygen ions are filled, and people are relaxed and happy when walking. And bamboo can absorb dust and harmful gases. It is like a natural filter to protect one side of the air. In Chengdu, there are bamboo parks. Although it is in a busy city, it can make the surrounding air better than other places, and residents go to rest more.
And bamboo contributes a lot to the balance of the ecosystem. Bamboo forests are habitats for many living creatures. Birds live on branches, and animals hide in them. Bamboo leaves decay into the soil, fertilizing the soil and nourishing other plants. Taking bamboo as the source, a rich food chain has been derived to maintain ecological harmony. It has been seen that in bamboo forests, bamboo insects eat bamboo, and birds peck insects, interlocking and full of vitality.
From this perspective, bamboo in Sichuan has many benefits for the environment, whether it retains water and soil, clears air, or maintains ecology. It is a gift of nature. It should be carefully supported and used to live up to the work of creation in heaven and earth.