In the past two years, a large number of workshops and factories have been established in Saidika and Pazar, and a large number of finished wool textiles have been shipped every month, as well as a large number of finished fur tanning products, and a large number of fashionable and exquisite leather jackets, leather pants and leather boots have been shipped, which have been exported to the Eastern Roman Empire, the Western Roman Empire, the Vandal Kingdom, the Visigothic Kingdom, the Franks and Burgundians, and the Lombards, and even to England in the Atlantic.

However, these are all bought by merchants from other countries, not sold by domestic merchants, and now every day factories and workshops are set up and start to produce, this kind of production of wool textiles and leather products is not very advanced, many people can see it, so the technology is not a secret in the country, after the society is established, some people set up factories to recruit workers to start production, so that many factories and workshops are established every day in Saidika and Pazar and other places.

According to the statistics of the Ministry of Industry and Commerce of the Royal Court, there are already more than 3,000 large and small workshops and factories on the territory of Qindongkongzhì, and the number is being renovated and increased every month, and the basic light industry system has been established.

In addition to these factories and workshops for the production of wool, textiles and leather goods, a large number of glass, glaze, breweries and workshops, as well as food processing factories, ironwork factories, carriage factories, clothing and shoes and hats factories, and a large number of factories were established, which produced a large number of finished products every day, and the sale of these finished products became a problem, because of the traffic conditions, and many caravans had a limited number of transports per trip. Many finished products are squeezed together and cannot be shipped. Qin Dong could only find a way to let the merchants take the sea route, and now the area he could control was only the west coast of the Black Sea, so he could only take the route here to sell goods and goods.

After the first seafaring trade, the merchants tasted the sweetness. Not content with sailing along the west coast and the Crimea, they began to organize themselves into large fleets and set sail to the east coast of the Black Sea, to the coasts of Georgia and Armenia in the Persian Empire, where they unloaded their goods and sold them directly to local merchants, or transported them to several economically and culturally prosperous cities such as Babylon in the Persian Empire.

Diplomatically. Qin Dongxian's current policy is not to offend other neighboring countries, and to maintain commercial and trade exchanges while also carrying out military exchanges. For example, Qin Dong established diplomatic relations with the Sassanid Empire of the Persian Empire, and both sides allowed each other's merchants to come to their own countries to do business and trade, and also provided convenience and protection for these merchants.

There were also larger merchants who organized fleets south to Constantinople and did not sell goods here. Because it was much more convenient to get to Constantinople by land. These merchants made little money in Constantinople, and after a short stop in Constantinople to replenish some fresh water and food, they continued south from the Turkish Straits to the Sea of Marmara and the Aegean Sea, and then across the Mediterranean to Alexandria, or to Cyprus and Syria and Jerusalem.

In this era, the farther the road, the more difficult the road is, and the more difficult it is for goods to reach. The more scarce the goods, the higher the price at which they can be sold. The higher the risk, the greater the profit, and as long as there is enough profit, the merchant can take the risk.

The scale of light industry has begun to take shape, and what we have to do in the future is to improve various industries in various fields of light industry, as long as it is a daily necessities, Qin Dong decided to be able to produce on the territory that he can control, and only on his own territory can produce by himself, not only to meet internal needs, but also to sell overseas.

In the light industry, there is one that Qin Dong needs the most at present, and what is most lacking in the Xiongnu Empire is not clothing and food, nor gold and silver money, but salt!

In Qindong vigorously advocated and encouraged the people to carry out agricultural production and produce more crop grain, in the past, the herdsmen of the Xiongnu and other nomadic peoples could also ingest salt from animal meat, although it was lacking, but it was not particularly strict, but if the food crops were the staple food, the salt intake from the food crops was not enough to meet the needs of the human body, and now many people began to take wheat and other main foods, which must solve the problem of salt. Otherwise, many people will get sick because of the lack of salt in their bodies.

Qin Dong has received a lot of reports during this period of time, many people have fallen ill because of a lack of salt, sodium ions in table salt are essential substances in the nervous system to transmit information, muscle contractions and heart beats are related to sodium ions. Therefore, if the human body lacks salt, the nervous system will be very weak, and people will appear to be weak, and eating too little salt will also cause the sodium content in the body to be too low, loss of appetite, weakness of limbs, dizziness and other phenomena; Symptoms such as anorexia, nausea, vomiting, rapid heart rate, weak pulse, muscle spasms, blurred vision, and decreased reflexes may also occur when the symptoms are severe. If the salt is insufficient, it is drawn from the bones; Muscle cramps at night are often a sign of salt deficiency, and when sweating and excretion, a part of the salt will be excreted from the body along with sweat and urine; Dizziness and fainting may also be due to the lack of water and salt in the body, so Qin Dong believes that the problem of eating salt must be solved in the shortest possible time.

The source of all salt in the advanced Xiongnu Empire is mainly the Western Roman Empire and the Eastern Roman Empire, the Western Roman Empire is in a period of chaos, and the people's livelihood is withering in all industries, not to mention salt, some of the simplest things are also difficult to transport to the territory of the Xiongnu Empire, the Eastern Roman Empire has salt to sell, but too little, can not meet the needs at all, so Qin Dong decided to find a way to solve the problem of salt by himself.

There are two main ways to make salt in this period, one is to dig from the underground salt well, this is mineral salt, the taste is really not flattering, and the color and condition are not very good, the second method is to boil salt, pour seawater into the pot, and cook salt over a high fire with firewood, this method mainly uses the solubility of salt, the content of salt in water exceeds its solubility and will automatically crystallize and precipitate, in this era the salt is mainly obtained in this way, and the amount of salt dug from the underground salt well is too small, and it is very difficult to find the salt well, It is not widely available. In Obaro, salt boiling was mainly done on the periphery of the Mediterranean, and the Western Roman Empire was the most skilled, but now the Western Roman Empire is in chaos.

In order to solve the problem of eating salt, Qin Dong personally rushed to the seaside and selected a few gentle coastlines with gentle beaches, and arranged for local officials to organize the people to build salt pans like rice fields.

In this era, boiling salt was the main method, and the method of boiling salt was divided into two types, the first was the leaky salt boiling method. The main production equipment is divided into three parts: first, sand width. Wherever the tide reaches the seashore, it is covered with fine sand (also known as tender sand) about 2 to 3 inches thick and raked loosely so that the sand can fully absorb the tide. If the tide is low and the tide does not reach the sand amplitude, it is necessary to pick up seawater to pour sand, and after the wind and sun dry, it will become brine sand. Second, salt leakage. The salt leakage system is used to leak brine. It is generally square, about 3 city feet high, about 2 city feet deep, with stone masonry on all sides, bamboo and wood at the bottom, and bamboo strips or thatch on the top to hold brine sand. The salt leak is buried under the sand, 1 city foot deep, the sea mud is built around it, a small pool is built next to the leak and the bottom of the salt leak is communicated, and the brine sand is poured into the brine into the brine and dripped into the small pool for storage and later use. Third, boil the pot. There are two kinds of pots: bamboo pot and iron pot. The bamboo pot is made of bamboo strips, with a square flat bottom, coated with lime or yellow mud, 1 zhang long, 5 feet wide and 3 feet deep. Each pot can boil 1000 pounds of salt. Another kind of iron pot is made of white iron, round or square with a flat bottom, 4-5 feet in diameter, 7-8 inches in height, each pot can boil 7-10 catties of salt, and boil for about 5-6 hours to become salt.

The second way to boil salt is to boil salt in dry water. Build an embankment on the seaside, build a simple water storage and evaporation pond, and divert the tidal water into the pool to dry to a considerable concentration and boil it into salt. The production of boiled salt is backward, the output is small, the labor productivity is low, and the cost is high. In particular, the amount of firewood consumed is large, and it costs about 400 catties of firewood to boil 1 load of salt.

Qin Dong decided not to boil salt this time, the Roman Empire was using boiling salt to make salt in the coastal area, and he decided to use the salt field method, that is, the seawater salt method to make salt.

Under Qin Dong's command, local officials organized the local people to build salt pans, such as the tic-tac-toe salt pans soon built a large area, and Qin Dong gave instructions to build crystallization ponds near the salt pans, the function of crystallization ponds is mainly used to let salt crystallize out of seawater, and the bottom of the crystallization ponds should be kept flat and clean.

In this era, Qindong had two methods to make salt from seawater, and the efficiency was much higher than that of boiling salt, the first was the solar method, that is, the solar evaporation method, and the other was the freezing method.

Solar evaporation is an ancient salt production method and a common method that is still used. This method involves building many ponds on the shore that resemble rice paddies to dry salt. The process of salt production includes the steps of tide acceptance, brine making, crystallization, salt mining, storage and transportation. Nati is the accumulation of seawater with high salt content in the repaired salt pans. When the water evaporates into the seawater and the sodium chloride reaches saturation, the brine should be transferred to the crystallization pond in time. The brine continues to be steamed in the crystallization pool, and the raw salt will gradually be deposited at the bottom of the pond to form crystals, and it can be collected when it reaches a certain level. Salt production in salt fields is greatly affected by the environment, the salinity of seawater, geographical location, rainfall, evaporation and other factors will directly affect the production of salt, but this is the most advanced salt production method in this era, even in the 21st century, the vast majority of salt is made by this method.

The method of freezing salt production is based on the principle that when the sea water is cooled to the freezing point (-1.8 °C), the sea water freezes. The ice formed by the sea has very little salt in it, and is basically pure water. Removing the water is equivalent to the evaporation of the water in the salt drying method, and the remaining concentrated brine can be used to make salt. (To be continued......)