In the port of Incheon, the five Daifuku ships are very busy, and the hired North Koreans are working hard to carry bags of rice to the Daifuku boats, and they can get a penny for carrying a bag of rice, and they don't need to travel far, such a good thing can't be found with lanterns.

As for the trainees of the Maritime Academy, they are preparing to return to Daming again at this time, such as material supply, ship overhaul, canvas repair, etc., before setting sail.

The time is relatively urgent, when he came, Liu Jin had repeatedly told him to return as soon as possible when he purchased food, Liu Jin needed food, the more the better.

Du Mingen's side naturally firmly remembered Liu Jin's words, and all the grain purchased back was rice, and the rice that had been removed from the chaff.

Buying rice directly naturally costs more money, but Du Mingen is really not short of money now, and all the glass products brought over this time have been snapped up by North Korean businessmen.

For glass products, especially mirrors, North Koreans, like the people on the Ming side, have almost no resistance, not to mention that when these students sell, they are all one by one, "how, how is it in our Daming", "This thing is also very rare and precious in our Daming", "This is the most popular thing in our Daming", "only large families can afford to use it" and so on.

This is all a marketing method that Liu Jin thought of in advance, North Korea in this era learns everything from the Ming Dynasty, what the Ming Dynasty likes, the North Korea side is the same, what is popular in the Ming Dynasty, North Korea is naturally also popular.

Coupled with proper hunger marketing methods, these five ships could have brought a lot of glass products over, but Liu Jin did not let Du Mingen bring too much, each thing has a certain number of restrictions, giving the North Koreans the feeling that this thing is indeed rare, and there is no longer a slow start.

So just by bringing a boatload of glass products to North Korea, Du Mingen sold more than three million taels of silver, and he had a lot of money in his hands.

So I don't care if the price of buying rice directly will be higher, what I care about is how to bring more grain back to Daming.

After a pound of rice is hulled, there are about seven taels of rice left, which directly brings the rice back to Daming means that you can bring more than thirty percent of the grain.

"A lucky ship can probably hold 6,500 stone of grain, and five ships can hold 32,500 stone of grain, which is 5 million catties of rice, which should be enough in a short time."

(Check the information Fu ship is more than 24 meters long, more than 9 meters wide, and has a load capacity of more than 500 tons, the lowest 500 tons are calculated here, 500 tons is equal to 1 million catties, a pound in the Ming Dynasty is about 560 grams, and a stone is about 153 pounds. ）

Du Mingen looked at the mountains of grain piled up on the shore, and calculated carefully in his mind that he had not purchased anything but food this time.

And according to Liu Jin's instructions, priority is given to selling glass products to merchants who can provide a large amount of grain, and if you buy it with grain, you can also give price concessions, so this time you can also purchase enough grain.

"The sale of this glass is really a million profits, a boatload of glass products brought over, not only in exchange for five million catties of rice, but also in exchange for three million taels of silver, and the silver spent on purchasing these grains is not even a fraction."

Thinking of this, Du Mingen couldn't help laughing.

He was also a merchant, and he used to be a merchant who bought and sold grain, transporting rice from the south to the north to sell, and he was a relatively successful businessman, and he could be regarded as a wealthy merchant by relying on the trade of grain.

But compared with Liu Jin, he suddenly felt that he used to be a petty fight, he couldn't get on the stage, he used to be tired and tired, and he was busy to the end of the year and could earn tens of thousands of taels of silver, which was already very good.

This is still the grain trade, which belongs to one of the most profitable trades of this era, and is listed as the most profitable trade of this era, along with the sale of salt, iron, silk, tea, cloth, etc.

But what about Liu Jin, a Xishan coal industry can earn a million taels of silver a year by selling coal that no one wanted before just in the capital, and the glass factory that he built is even more profitable.

This means, this speed of making a fortune, he is really impressed.

Fortunately, he also has his share in this transaction, the fleet and the glass factory are separated, the money earned by the fleet is the money of the fleet, and the money earned by the glass factory is the money of the glass factory.

After all, the shareholders are different, the shareholders of the fleet are Du Mingen, Liu Jin, and Emperor Hongzhi, and the shareholders of the glass factory are Liu Jin and Zhu Houzhao, and the accounts still have to be settled clearly.

This glass product was purchased on credit from the glass factory, and the price was calculated according to seventy percent of the sales price of the ancient and modern buildings.

Therefore, carefully calculate an account, settle the payment from the glass factory after going back, and then pay salaries, rewards, etc. to the crew who go to sea this time, and this trip can still have a profit of two million taels.

According to the original discussion, he Du Mingen can account for one-third, which means that a trip to North Korea will only take about half a month, and he will be able to earn almost 700,000 taels of silver.

Counting this, Du Mingen's whole person couldn't close his mouth with a smile, this money came too quickly, too easily.

This strengthened his confidence in following Liu Jin to make a fortune.

"It's no wonder that those big families in the south are trying their best to go to sea to do business, and this trip to the sea is enough to eat for a lifetime."

Du Mingen remembered that in coastal areas such as Jiangsu, Zhejiang, and Fujian, there were many big families who secretly went to sea to do business, and they were all rich in oil.

He used to only do grain trading, and he had never been in contact with the sea trade, and he did not have an intuitive feeling about the profits of the sea trade.

But now he knows the profits of this sea trade at once, and he also personally understands what Liu Jin said.

"This is just a trip to North Korea, if there is a chance to go to Europe and Africa in the future!"

At this time, in Du Mingen's eyes, the turbulent sea in front of him seemed to be a cornucopia containing mountains of gold and silver, and as long as there was a boat, he could obtain endless wealth from it.

As for the sale of grain on land, he doesn't look down on it at all now, so let's let others earn this kind of hard-earned money.