Hearing Li Chunfeng's words, Yuan Tiangang was also shocked, and asked with a serious face: "Chunfeng, are you sure that your calculation is not wrong?" ”

"Master Yuan, you know my calculation technique, there will definitely be no problems, and from the celestial phenomena some time ago, it is also consistent with my calculation, but now my Datang's national fortune seems to be covered by a layer of fog, and I can only calculate the national fortune in the next hundred years, and if I extrapolate it backwards, there will be some unknowable changes, which cannot be calculated at all." Li Chunfeng said with an affirmative face, just as Yuan Tiangang believed that his physiognomy would not make mistakes, he also believed that his calculation technique was absolutely correct.

"Good, good! This is very good, your calculation technique is the most accurate for such a major event as the fortune of the country, as long as the land of China is peaceful and the people no longer suffer from the war, everything else is just a trivial matter. Yuan Tiangang said with a relaxed face. The speculation of national division has always been like a boulder, weighing heavily on his heart, and now he knows that the Tang Dynasty is strong and prosperous, and there is no sign of division in a hundred years, which makes the boulder in his heart immediately dissolve.

"But if my Datang is not divided, then why do there be two heirs, what is going on?" Although Yuan Tiangang was relaxed, Li Chunfeng began to worry about this problem again, he is a more serious person, and he wants to understand any problem, which is also a common problem of mathematicians.

However, it may be limited by vision and knowledge, Yuan Tiangang and Li Chunfeng consulted together all night, but they couldn't find any reasonable explanation, so they had no choice but to hide this secret in their hearts, after all, this kind of thing is only talked about by their master and apprentice in private. and other people can never be revealed, not even Yifan. It is precisely for this reason that when seeing them off, Yuan Tiangang and Li Chunfeng were both in poor spirits.

After sending Li Chunfeng away, Li Su counted with his fingers and found that there didn't seem to be anything too important recently, several industries such as fishing, salt, food processing and shipbuilding in Dengzhou. I have already set up the framework, and others will naturally improve it, and what is lacking now is time for development.

Thinking about finally being able to relax for a while. Li Su immediately became excited, and he has been busy with political affairs for more than half a year after coming to Dengzhou. For Wen Xin, several of them couldn't help but snub a little, fortunately, they are all reasonable women, and they are also very supportive of Li Su, and they have never complained about him, which makes Li Su feel even more guilty in his heart, and he can just take advantage of this time to accompany them more.

Li Su's plan was good, but he hadn't been with Wen Xin for a few days, and someone in the palace suddenly came to visit, and this person's identity was not simple, so Li Su had to see it.

The main hall of the palace of the king of Qi. Li Su sat on the hall, frowned and looked at the people who came to visit, and after a while, he slowly asked, "Zhou Kun, how is your injury, is there anything important to come to this king today?" ”

The person sitting below is none other than the mysterious Zhou Kun from last time. However, unlike the dying appearance last time, Zhou Kun in front of him was dressed as a businessman, and his complexion was also very good, and he was sipping tea with a smile on his face.

"His Royal Highness Xie cares. The villain's injuries have healed, and this time he came to see His Highness, because he had a secret letter to hand over to His Highness. Zhou Kun hurriedly stood up and bowed.

"Secret letter?" Li Su frowned, according to Wu Meiniang's guess, this department to which Zhou Kun belonged was likely to belong to a secret force in the hands of his father, and this kind of hidden force should have nothing to do with him, right?

Just when Li Su was guessing, Zhou Kun took out a letter from his body and took a few steps forward to present it to Li Su. Li Su took it and looked at it, and found that the fire paint on it was very complete, and then opened the letter and looked at it, but when he saw the handwriting on it, he was immediately startled, this was actually a letter from his emperor's father.

Li Su read the letter with a solemn face, but the more he read it, the more excited he became, Li Shimin's letter did not say anything superfluous, but just explained that he was doing a thing, but with Li Su's intelligence, he naturally saw the meaning from this incident. After preparing for so long, it was finally time for the harvest.

"Zhou Kun, what is the latest information on Goguryeo?" After Li Su read the letter, he directly lit the fire and destroyed the letter, and then turned his head to Zhou Kun with an excited face and asked.

"Your Royal Highness, because after the villain got that information last time, the Yuan family was worried about the leak of the matter, so they have stepped up their preparations now, and it is estimated that it is likely to be launched in advance, after all, the contradiction between them and King Rongliu has reached the point of irreconcilability, and there is no room for reversal at all." Zhou Kun said calmly, this information should never be told to outsiders, but Li Su has a special identity and needs his help in Goguryeo's affairs, so with Li Shimin's permission, Goguryeo's information is all open to Li Su.

"Very good, you go down, if there is anything to help this king in the future, don't be polite!" Li Su excitedly turned around the hall a few times before he said to Zhou Kun.

"Yes, the villain is retired!" Zhou Kun gratefully agreed, and then turned to leave. In addition to delivering a letter to Li Su this time, he also had another important task on his body, so he dressed up as a businessman. Li Su also guessed this, but he never asked him a word, just gave him a promise of help, this kind of unspoken support and tacit understanding is what moved Zhou Kun the most, after all, he is a person who walks in the dark, he may encounter danger at any time, and a little more help will give him an extra guarantee of life.

After letting Zhou Kun step back, Li Su not only didn't say sorry to Wen Xin, after all, the matter Li Shimin explained was too important, and he had to do it himself. However, Wen Xin didn't have any complaints, just put on the coat that he and Xijun made together, and at the same time told him that the weather was getting colder, and it was okay to be busy outside, but he must pay attention to his body. In fact, for Wen Xin, as long as Li Su can come back to accompany her for a while every night, she is already very satisfied, and she doesn't have to be by her side every day.

From the next day, Li Su immediately began to get busy, first asked Liu Renliang to organize a large number of craftsmen for construction, and then Li Su, accompanied by Zhao Fu, almost turned the entire Dengzhou boundary, and finally selected a very ideal location, ready to build a very important place.

According to the function of this place, the first element is secrecy, so it is either built in a very secret place, or built in a well-guarded place, it is easy to find a secret place, Dengzhou is mountainous, and there are countless hidden valleys, but in the end they were all given up by Li Su, because although these valleys are hidden now, if the project is completed, it will be difficult to keep it hidden.

Therefore, Li Su chose to choose and choose, and finally decided not to build this place on land, but to find a small island in the sea. There are many small islands on the sea outside Dengzhou City, most of them are desert islands that are uninhabited, of course, this island can not be chosen at will, and finally Li Su found a good island in Dengzhou Naval Army Ten miles outside the military port, this small island is not only large, but also the island is surrounded by cliffs on three sides, as long as a tall and strong city wall is built on the side with a beach, and then a team of soldiers are sent to guard, it has become an excellent stronghold that is easy to defend and difficult to attack.

Both the area and the location of this island are very much in line with Li Su's requirements, the first area is large, which can build that important place, and can also accommodate enough people and materials. In addition, the location is good, only ten miles away from the Dengzhou naval army, and a team of warships can be sent to guard it at that time, and the problem of security and confidentiality has also been solved.

After the place was chosen, Li Su immediately sent all the craftsmen prepared by Liu Renliang to the island, and at the same time, the cement and wood used for construction were also sent over in a steady stream, and Liu Renliang, the main book, personally went to the island to supervise, and reported the progress of the project to Li Su every three days, and it was best to complete it in one month.

At the same time as the construction of the island began, Li Su also began to release information to the merchants of Dengzhou to buy saltpeter and sulfur, because Li Su invented fireworks and gunpowder, so the imperial court purchased a lot of saltpeter, so Li Su soon purchased a lot of saltpeter, as for sulfur is more troublesome, after all, the sulfur in the Central Plains is not much, and the quality is not good, so the acquisition is somewhat difficult.

However, this did not bother Li Su, and he told the maritime merchants that the volcanoes in the northeast were full of volcanoes, and the sulfur mines were very rich and of excellent quality, and they could go there to buy them.

As soon as this news came out, many businessmen were immediately excited, if it was before, now the new route has been opened, you can go directly from Dengzhou to Silla, as for the Wa country, it is a turning thing, plus the time of procurement, at most ten days can run back, and the sulfur transported by the Dengzhou government is purchased, and the price is also guaranteed, this kind of good business is naturally willing to do.

Driven by profits, many merchants began to take action, loading luxury goods such as silk, perfumes, and mirrors produced by the Tang Dynasty on ships, and then transporting them to the Wa Kingdom through new routes to sell them in exchange for a large amount of precious metals such as gold and silver, and then purchasing sulfur at a very low price, and shipping it back to Dengzhou to make a profit.

Under this operation, the problem of sulfur was also quickly solved. And just when the project on the island was about to be completed, several fleets of different sizes also arrived in Dengzhou one after another, these fleets did not look special on the surface, but if you look closely, you will find that there are fewer goods on it, but there are more people on board.

Whenever these fleets docked, the people on board immediately entered Dengzhou, and then quickly disappeared into the huge floating population in Dengzhou, and just after the last fleet landed, one of the people in the fleet was taken to the house by Li Su, and at the same time, the house had already prepared a banquet to wash the dust for this person. (Site. Your support is my biggest motivation. )