Guo Kang rejected most of the proposals, and only kept the lamp that was indeed of the nature of "powerful bricks flying".

Because he felt that the focus now was on teaching and experimenting. After all, he is not a professional, he just knows about some small experiments. When more people participate in the research, there will definitely be people who are smarter than themselves and will soon achieve technological breakthroughs.

The current equipment is too rudimentary, so it is better to wait for them to study it for a while. For the materials and craftsmanship of this era, local scholars must be more familiar than him, even if they polish and streamline it a little, it may be better than the current situation.

In this case, scarce funds should be used mainly for participants to conduct research and draw lessons learned. Instead of starting right away and building a huge spectacle, start with a small research facility. Every time there is an improvement, pay for an upgrade. This is the best strategy during the period of rapid technological rise.

In this way, it doesn't take too much to find out the highest level that can be achieved in this era, and the rest is slowly waiting for breakthroughs in materials and processes.

In this period, you can use the plan of Dehuan to say that the reactor power and reactor scale can be used. If you really want to build a spectacle, it's better to wait for that time, not now.

As for the Slavic slaves who took off their farewells...... This is really useful.

Tuhuan had heard Guo Kang talk about his worries, and he had also considered the problems that would arise if scientific and technological research and development could not catch up with Western Europe. However, he is confident that he will not lose.

For example, it is well known that slaves were a major feature of Rome.

Although there were basically slaves in every civilization, it was rare for slaves to become the main pillar of the economy, as was the case in Rome in Italy.

In fact, in Guo Kang's previous life, with the deepening of research, a group of scholars believed that the slave society was actually a characteristic of Rome, or even only a few regions such as Italy. In the course of the campaign, the legion gathered a large number of slaves from the entire Mediterranean world here, which formed such a spectacle.

Elsewhere, the conditions of "consistent victories and captures" and "preference for the use of slaves" are not necessarily met at the same time.

One example is that in Seris, the Shang Dynasty was once considered a slave society. But with the rapid development of archaeological technology, scholars have gradually discovered that this does not seem to be the case.

It is true that the Shang Dynasty army fought all day and often captured prisoners, but they did not often "use" prisoners, but often "used" prisoners. In oracle bone inscriptions, this word means to kill for sacrifice.

Therefore, the people of the Shang Dynasty did not seem to be greedy for money or lustful - they did not like to capture male slaves to work, nor did they like to capture female slaves to play, but killed and sacrificed their ancestors regardless of whether they were male or female.

In this case, it would not have been possible for him to accumulate as many slaves as Rome did......

Therefore, this kind of case may be very rare and not a universal rule.

Even the Purple Horde, although retro everywhere, the slave estates could not be restored. Most of the slaves, not long after they were caught, were resold.

Italy's commercial countries, such as Venice and Genoa, all have a number of trading posts on the Black Sea coast. Under the Purple Horde, many of the commercial city-states lost their military and tax privileges, but the khanate welcomed trade itself. An old friend like Venice also has a lot of preferential treatment.

These were skilled slave traders who had been in the business for hundreds of years. They had a sales network throughout the Mediterranean, and they could sell slaves quickly to reduce the cost of hoarding.

But the main problem was that Slavic slaves were too cheap.

During the long course of the trade, the slave traders developed a well-developed evaluation method.

For example, the most valuable are the Circassian slaves in the Caucasus. The slave merchants of the Celestial Sect believed that these people were the most beautiful and clever. They were very popular in the harems of the sultans and emirs everywhere - both men and women.

Unfortunately, the Purple Horde mainly received Magyars, German and Slavic slaves.

The Magyars were mediocre in price, while the Germans were heavily divided - their males, especially experienced mercenaries, were very popular with the Celestial Sect princes. The sultans would often make pacts with them, allowing them to free themselves after only a few years of fighting, and were even willing to offer spoils of war as a reward.

But on the contrary, the slave traders did not like German women. Mamluk merchants thought they were too rigid and unfeminine to meet willing buyers.

It's just that the Purple Horde itself also likes to recruit German and Mazar prisoners of war in this way, and these mercenaries are often not very selective. In reality, not much makes it to the market.

And the Slavs ......

The price of a better Slavic slave was a quarter of that of a Circassian slave. In the event of large-scale trafficking, it will continue to depreciate. This kind of price is really frustrating.

One of the main problems with the Purple Horde was that with the reform of the Northern Army, the number of Kipchak, Bolgar and Tatar slaves in the steppe decreased dramatically.

Under the new system, no one can reorganize people's tribes and organize them to serve as soldiers, and at the same time sell their relatives, wives and daughters as slaves. In this case, everyone has to rebel......

Later, the Purple Horde moved south into Greece, wiped out the mercenary groups of Western Europe entrenched there, and the Duchy of Achaea and Athens they established, and easily defeated the Neapolitans who tried to infiltrate there.

Tuhuan told Guo Kang that the most distributed places of his mother's supporters were not around Dadu, but on the side of Athens and Morea. So, as you can imagine, these places are no longer used as slave sources.

In this way, the vast majority of slaves came from the Slavic regions.

In addition to fighting Poland, Lithuania, and the rebellious Rus' principalities, there are a large number of unattended villages. Almost all of the inhabitants of these places work part-time as bandits. And the Purple Horde was not polite, and often took the initiative to destroy these settlements and sell the people inside as slaves.

On the land of Eastern Europe, various wild Slavic settlements can often be found along various river forks and among the trees. The Purple Horde has been captured for decades and has not seen a reduction so far. The slave traders themselves wondered how the Slavs could not finish their catches.

Of course, this situation made the Slavs even cheaper.

The Mamluk merchants have always been very speechless, feeling that they are shoddy. There are low-end products in this market, and how can people buy them.

But the Purple Tent had no choice but to explain to them, saying that there were still slaves now, and they were all Slavic slaves, and you didn't want to have anything else to pick ......

Now, the only good news is that there is another market. You can cross the ocean and sell them to Javanese dollars.

Although it may seem far away, the Indian Ocean route is very mature. Moreover, there are various supply stations along the way and buyers who wish to purchase can go and sell all the way. Javanese traders were also active and could be found in the Red Sea and East Africa.

The Purple Horde had always wanted the other side to buy more, but this trade route was currently full of obstacles.

The sale of Slavic slaves was directly related to the income of the first-line military government in the north and the interests of the legionnaires. Seeing that everyone's slaves were about to be unsold, the Khan court had been anxious.

Therefore, seeing that Guo Kang's research needed to use Slavic slaves, he was immediately moved.

With the help of Rome's advanced slavery system, it was easy to surpass the backward feudal states of Western Europe in the speed of scientific research and the efficiency of experiments. If these devices could be mass-produced, it would be even better if they could give the unsalable Slavic slave laborers a place to go.

Moreover, these technologies will be beneficial in the long run, and the Khan court can afford to wait. Therefore, he even hopes that Guo Kang can use it more, as long as it is convenient.

Looking at the character card, counting the tag points that will be available soon, Nurhachi should soon be able to achieve four stars.

The effect is to change the existing ones: chicken legs, blades, amulets, true love diamonds, etc., to their own names in the character gift-giving column. I'm going to change it to the Irish, the arrow, the ironclad, the edict. Let's go back and see how many can be changed.

(End of chapter)