The fleet set sail, and a fleet of six A-type ships divided the founders of the fourth city into two groups and sent them to the south bank of the Yellow River.

After the two deliveries, five of the A-type ships went out with the expedition team for the first expedition mission of the year.

At present, the Dragon Tribe has a total of nine A-type ships, and there are three new A-type ships in the shipbuilding area that have started construction.

There were still fewer ships, five A-type ships carrying the expedition team out, leaving only four A-type ships, and one had to be left to travel back and forth between the three cities to quickly transmit information, transport personnel, transport supplies and other things.

The remaining three A-type ships traveled between the three cities on the north bank of the Yellow River and the fourth city under construction on the south bank of the Yellow River.

Su Yan and Zhi have already set a year to build the fourth city, minus the time for winter, spring ploughing, autumn harvest and rainy days, the time that can be spent on building the city is probably only about two hundred days, and only the dragon tribe, whose population is about to exceed 20,000, has the ability to complete such a large-scale project in the primitive era in one year.

The dragon tribe is growing rapidly, but what are the other tribes doing? Most of the tribes in the north are still thinking about how to solve the problem of food every day, and most of the tribes in the south are close to the food problem, but they don't know where their tribe is heading, and the development of the tribe has become very slow.

In fact, those tribes who like to fight abroad are equivalent to taking a path forward, the population of a tribe is so small, only the population continues to increase, in order to make science and technology and even civilization continue to progress, population is the foundation.

There is still more than a month to go for spring ploughing, and Su Yan needs to find something to do.

The dragon tribe needs to carry out a lot of things this year, the construction of the fourth city has been carried out, and the preparation of the remaining three ministries of the Ministry of Industry, the Ministry of Agriculture, and the Ministry of War will also be carried out this year, and there is no hurry for the time being, and the preparatory work will be put in the second half of the year, mainly in the winter, and there are many things such as making longbows in batches and developing bed crossbows.

In the end, Su Yan set his sights on winemaking, winemaking was not to satisfy Su Yan's appetite, in his previous life, Su Yan did not smoke and drank very little, mainly for entertainment.

The concentration of 70 to 75 percent of the alcohol can be used for disinfection, too high concentration of alcohol will form a protective film on the surface of the bacteria, preventing it from entering the bacteria, it is difficult to completely kill the bacteria, if the alcohol concentration is too low, although it can enter the bacteria, but can not coagulate the protein in the body, and the same can not completely kill the bacteria, of which the concentration of 75% alcohol disinfection effect is the best.

The concentration of 40 to 50 percent alcohol can prevent pressure ulcers, and the back, waist and buttocks of long-term bedridden patients can cause pressure sores due to long-term pressure, such as pouring a little concentration of 40 to 50% alcohol into the hands during massage, and massaging the patient's pressure area evenly, which can achieve the purpose of promoting local blood circulation and preventing the formation of pressure sores.

The concentration of 250 to 50 percent of the alcohol can be used to reduce fever physically, and patients with high fever can use it to rub their bodies to achieve the purpose of cooling, because wiping the skin with alcohol can make the patient's skin blood vessels dilate, increase the heat dissipation ability of the skin, and the alcohol evaporates and absorbs heat, so that the patient's body surface temperature is reduced and the symptoms are relieved.

In his previous life, as a Chinese medicine practitioner, Su Yan knew more or less about the ancient methods of winemaking.

In the legendary Yellow Emperor period and Xia Yu era, there was a wine-making industry, and the origin of wine-making was before that, in ancient times, people may have come into contact with some naturally fermented wine, and then imitated it. (The first wine you came into contact with – monkey wine?) ）

In ancient times, the origin of winemaking was often attributed to the invention of Du Kang, and he was regarded as the ancestor of winemaking, which became an orthodox view because of its great influence.

"There is no end to the food, the empty mulberry is commissioned, the stagnation becomes the taste, and the gas is fragrant for a long time, which is from the generation, and it is not a strange recipe." It is said that Du Kang placed the uneaten leftovers in the tree hole of the mulberry garden, and after the leftovers were fermented in the cave, a fragrant smell came out.

This is the way of wine, there is no strange way, by a chance in life as an opportunity, inspired to create the inspiration of invention, this is very in line with some laws of invention and creation, this record in later generations, Du Kang became a very able to pay attention to the little things around him, and can start the creative inspiration in time.

All in all, the ancient method of making wine seems simple.

In the first step, the grain is mixed into the koji, and after steaming, it is more conducive to fermentation;

In the second step, after the half-cooked grain is out of the pot, it should be spread on the ground, that is, the process of stirring, batching, stacking and pre-fermentation;

In the third step, the raw materials are fermented in the cellar.

Su Yan thought about writing down the method of making wine step by step, and finally fermented the old liquor mother in the cellar, the alcohol concentration is still very low, and it needs to be further distilled and condensed to obtain a liquor with a higher alcohol concentration.

It seems that the method of making wine is indeed very simple, but there is one step that stumps Su Yan, that is, the thing "koji", as long as he can get the "koji", Su Yan can use millet as the raw material to make wine.

Koji, also known as sake rice dumplings, is made by moving the conidia of koji mold into the white rice that has been intensively steamed, and then keeping it warm, and the mycelium grows luxuriantly on the rice grains.

The amylase produced by Aspergillus saccharifies the starch in rice, so since ancient times, it has been used as a raw sugar along with malt to make wine, sweet wine, soybean paste, etc., and wheat is used instead of rice to call malt malt.

The main raw materials for making koji are wheat or rice, but these two crops are not available in the dragon tribe, so Su Yan is stumped.

Fortunately, Su Yan didn't have a hot head, so he directly mobilized people to prepare for winemaking, and there was no way to make koji, so there was no way to make wine, and the preparation was a waste.

It is undoubtedly very difficult for the Dragon tribe to find wild wheat or rice by themselves, and there are only a few crops found by the Dragon tribe over the years, millet, soybeans, and hemp are the main crops planted by the Dragon tribe, and the rest are several wild vegetables.

The best way to find wheat or rice is to conquer the tribes that are already farming, and perhaps find the crops that Su Yan needs, and according to the climate, rice should be grown further south, and wheat may be found in the Yellow River valley.

The north bank of the Yellow River is almost a matter of thought, there are very few tribes engaged in agriculture here, but it is possible to find them on the south bank of the Yellow River.

Since the conquest of the Niu tribe, the dragon tribe's conquest team has attacked the tribes on the north bank of the Yellow River for the third time, which is not good, and the next step is to attack the tribes on the south bank of the Yellow River.

Wheat, rice, steamed buns, flower rolls, noodles, mille-feuille, rice, hiss!

Thinking about brewing, how did you think about eating again......