At least 30 large fishing boats operate here in the Yangtze River estuary, from the initial three to the current 30, the output is 10 times higher, and the huge Yangtze River estuary fishing ground can also support the continuous fishing of 30 fishing boats.

From the beginning, there were few people on board, and now, after long-term training and training, there are at least 3 groups of personnel.

After a simple adjustment, the fishing boats continue to fish at all times, except in windy weather or weather that is not suitable for fishing at sea.

Originally, after the fishing boat was full of fish, it would choose to return to the Ding Navy, but now, with the development of Haimen at the mouth of the Yangtze River, large-scale processing enterprises can manufacture a series of products such as pickled fish and canned fish.

It is not easy to transport simple fish, even if the tonnage is large, it is impossible to use it all, plus fishing nets, machinery, and personnel, most of the space is not able to be transported.

However, cargo ships are different, the pickled fish is finished, and then dried to dry, which can reduce a lot of weight and volume, processed products and canned food, but also can make perfect use of the space of the whole ship, especially after the emergence of a large number of transport ships, it is not a problem.

The 30 ships supporting the Northern Expedition, after 3 transports, were actually maneuvering, but the Ding Navy already had 30 ships at that time.

A 12,000-material fishing boat can hold hundreds of tons of fish at most, but a 12,000-material transport ship can transport several times or even ten times more than the fishing boat.

After Zhao Xin completed the trip to Bianliang, he did not directly return to the Ding Navy, and now the development of the Ding Navy has been in a bottleneck state, land and population are the biggest problems restricting the development of the Ding Navy, and this point, even if there is such a terrible golden finger as the card system, there is no way to conjure it out of thin air.

A complete scientific research system has been formed, Zhao Xin only needs to pay attention to it occasionally and not let some key projects deviate, and the rest of the time, there are not many things for Zhao Xin to deal with by himself.

Zhao Xin had the kung fu to get out of the heavy government affairs and take a look at the future development of Ding Haijun.

Population, territory, this is the key to the future development of the Ding Navy, at present, with the help of caravans from all over the country, the tentacles have penetrated deep into the entire Northern Song Dynasty, immigrating imperceptibly, the current effect is very good, from this year, almost every month of the immigrant population, have gone up to a level, it is expected that by the end of the year, the total population may exceed 5 million, after the New Year, in reality as an example, there may be a greater breakthrough.

Similarly, Zhao Xin also targeted the Han people in the north, these Han people in the north, who had been managed by the Liao State for many years, had become a habit, and they might not soon be attached to the arms of the Northern Song Dynasty, even if the Northern Song Dynasty took the sixteen states of Youyun.

Instead of dividing efforts to manage and suppress, it is better to hand over these unwilling people and captives to Zhao Xin to manage, which is also a new growth point of the population.

Whether it is natural growth or migration from the outside world, this will not happen overnight, unless it is directly persecuted and plundered like Yuan Hao, which will cause sequelae.

At present, for the Northern Song Dynasty, the biggest thing is the Northern Expedition, Zhao Xin only needs to do a good job of logistics and support, and under such a premise, increasing the population is the best choice.

In a short period of time, there will be no huge changes in the population, at most the work will be detailed, for some oppressed, even impoverished, almost unbearable, to provide enough support, so that they can come to the Ding Navy quickly, but not on a large scale, centralized, the development of the Ding Navy is still very immature, and there is no ability to really confront the Northern Song Dynasty head-on.

The population is out of options, and the land is a key place.

Ding Haijun's land, that is, more than 300 square kilometers, is not as good as a hundred miles, but the Northern Song Dynasty, and even China in the past, did not pay attention to the islands, so Zhao Xin found an opportunity.

After landing in the Ryukyus and taking a base, it is equivalent to territorial expansion.

It has been a few months since the occupation of the Ryukyus, from the first group to the island, to the war, to the present, the second group of personnel and support, which is equivalent to saying that the territory has been opened.

The problem of ship safety, if it was on a previous Chinese-style sailing ship, Zhao Xin would never choose, at this time, to go to the Ryukyus, but now, the completion of a large number of Western-style sailing ships, under the conditions of Gao Haiqing, the stability has been greatly increased, which provides sufficient safety.

After careful consideration, Zhao Xin decided to take the risk of going once, the Ryukyus he knew were all in the news of later generations, because of historical reasons, Taiwan's population was extremely dense, and the economy was also developed, but in this era, where is still a barren land.

Although, almost every week, news about Taiwan came, one after another, more than 100,000 people were selected to go to the island, and the materials were spared, but he still didn't feel at ease if he didn't go to the island to see it with his own eyes.

On the premise of not continuing to expand, Ryukyu is already one of the most important bases of the Ding Navy, and the farther Hainan is similar to the Ryukyus, or even more flatland, but the distance is too far, and the north is a matter of two or three years later, and it is even more necessary to put it aside, and use five years to turn Ryukyu into a stable industrial and agricultural base to ensure continuous expansion in the future, which is the practice of stabilizing the foundation of the Ding Navy.

On land, it took not long to take the Beijing-Hangzhou Grand Canal to reach the mouth of the Yangtze River, and the large transport ships that were exchanged at the mouth of the Yangtze River were replaced by large transport ships, this time to Ryukyu, Zhao Xin was special, and by the way, he took a fleet specially used for Ryukyu supplies.

This fleet consisted of five merchant ships that transported the fish caught in the Yangtze River estuary, as well as supplies and grain purchased from the Yangtze River basin to the Ryukyus.

There is another one of the same fleet, which is directly from the Ding Navy to the Ryukyus, mainly personnel and some necessary equipment, and the materials that can be produced in the Northern Song Dynasty, even if the price is a little more expensive, are not transported through the Ding Navy, the reason is very simple, the capacity is not enough.

Transportation from Jiangnan, not only closer, but also does not occupy the population, the importance of the Ryukyus, in the current development strategy of the Ding Navy, is the first sequence, in this case, not very suitable for foreign immigrants to come.

They must work in the Ding Navy for more than one or two years, and from all aspects, they must be evaluated from all sides, and they will be selected from among the personnel who are already loyal to the Ding Navy.

Within a year, it will gradually increase, and when the total population begins to exceed 500,000, there will be a choice to let some new personnel join the Ding Navy.

In the future, the Ding Navy itself will gradually shift from a comprehensive development to research, military, and navigation, while the Ryukyus will be responsible for productivity, and almost most of the factories will be gradually transferred to the Ryukyus.

Compared with the small and almost undefended Ding Navy, the Ryukyus have a foundation for development.

Of course, this is just a precautionary idea, in fact, in the artillery has appeared, even if it is an old-fashioned bronze artillery, even if it is a combination of black powder and nitrocellulose, the power of firearms has formed a generation gap for the Ding Navy, as long as it is not the negligence of the Ding Navy itself, the tactics of the sea of people, for the Ding Navy, there is almost no effect.

In the face of artillery, there is no cluster charge, which can play a role, just in this era, the invincible heavy cavalry, in the face of artillery attacks, they are almost a target.

Through the small boat, I went up to the big ship, which was a ship that had left the sea gate, and it should have turned its head down half a day ago, but it had to stay here.

However, on this boat, Zhao Xin unexpectedly saw a person, Xue Yu.

As the highest general of the Ding Navy, Xue Yu was actually quite boring, and the Ding Navy did not have much military action, at most, it was training, so during the Northern Song Dynasty's Northern Expedition, he asked him to come out.

Now he should be in the north, near the Bohai Sea, protecting Shanhaiguan and the Liaodong Peninsula, how did he get here.

I asked for a while to know, it turned out that in the direction of Shanhaiguan, the construction of 6 fortresses has been completed, and the 3 gaps have been blocked quite tightly, in the direction of Shanhaiguan, because of Liao Xingzong's royal conquest, continue to strengthen Shanhaiguan, and build two more fortresses.

These two are not the ones that were built as quickly as before, in order to urgently block the pass.

This kind of fortress only has the basic defense of the fortress, and even the height is only about 20 meters, and some fortresses built on high mountains may be close to this.

The two that were built later were built on the basis of the first two and in a reasonable position, and the real fortresses were built with a height of more than 30 meters alone, and their volume and defensive capacity were several times larger.

One plus one is not necessarily equal to two, reasonable layout, even greater than 2, when these two forts are completed, 4 forts will be the entire Shanhaiguan protection of the water leakage, not only plugging the gap, in any direction, is a huge threat.

Because all the actions were secret operations, the Liao State did not realize at all that it was the Song people who attacked the Liaodong Peninsula, because of the short battle, and their identities were not revealed, and they did not realize that the target of the Northern Song Dynasty did not notice the changes in Shanhaiguan at all.

Similarly, Liao Xingzong mobilized 250,000 troops, plus the troops left in Tokyo, totaling more than 400,000, this number has exceeded the limit of what the cultivators can deal with, and even with such a large number of troops, there is not much room for maneuver on the Liaodong Peninsula.

The area of the Liaodong Peninsula is not large, that is, 30,000 or 40,000, that is, the area of Taiwan and Hainan Island, which is much smaller than any inland province, and such an area is not suitable for large-scale cavalry maneuvers.

After receiving a reminder from the Privy Council, he thought twice and decided to continue northward, along the white mountains and black waters, all the way north, to taste the scenery of the northeast, and wait until the main force of Liao Xingzong was transferred and then returned.

For this, Xue Yu has nothing else to do except admire, such a transfer, at least, it will take 1 month, he doesn't need it in both aspects, he heard that Zhao Xin is going to Ryukyu, so he mobilized a speedboat over.

Because of the Northern Expedition, the Ding Navy specially dispatched two clippers for intelligence and information transmission in the north, most of these ships are to transmit information, but as long as they are ships, they can carry people, the key is that there are few people, and the problem of comfort is uncomfortable.

In order to come over as soon as possible, coupled with the fact that it is impossible to transfer sea ships, it is necessary to stay in the Bohai Sea and deal with variables, and only a few people can come, so it is best to choose these fast boats.

For Xue Yu's explanation, Zhao Xin was also a little helpless, fortunately, Xue Yu was not appointed to be in charge of transportation, he just thought about it quietly, and wanted to go over and see, there was someone else in charge of the entire fleet, plus the relationship between Xue Yu and Sun Ji, it was okay to go over and see.

With Xue Yu's accident, there was nothing else, a team of five ships began to sail to the deep sea.

After all, Ryukyu is a bit far away, even from the mouth of the Yangtze River, there is at least 900 kilometers of sea distance, which is 500 nautical miles when converted into nautical miles.

The monsoon is also considered to be taken care of, not directly by the direction of the wind, but it also gives a lot of speed, with an average speed of more than 9 knots per hour, that is, it can sail more than 100 nautical miles a day.

Because of Zhao Xin's relationship, he only sailed in the deep sea, and at night, he would not continue to sail, but chose to dock on the shore, so that the safety was guaranteed, and it took 6 days to arrive in Fuzhou, and in the newly opened port of Fuzhou, he repaired for two days, followed by two other fleets, forming a huge fleet of 20 large ships and 300 small boats, and began to go to the Ryukyus.

After arriving in Fuzhou, it is much simpler, this strait is relatively stable, compared to other open seas, much better, and it has been calculated, there will be no large-scale storms, and the same is true for the same huge fleet.

The sea gradually deepened, and then gradually became shallower, because there was no Penghu line, it was direct, and there were no islands in the middle, and it took almost a day's time, starting in the morning, and approaching the evening, before seeing the huge land.

On the unobstructed sea and seeing the land, this feeling is different, compared to Zhao Xin's calmness, the other captains and boatmen are nervous.

Those who can carry out this route are the most trustworthy of the Ding Navy, and they also know the most about the situation of the Ding Navy, and the entire Ding Navy is almost created by Zhao Xin, millions of people, plus terrible wealth, if something goes wrong with Zhao Xin, then the chaos will be big.

Taipei Port is in sight, a few months of development, after clearing up the threat of the natives, the first to build and expand is Taipei Port, thousands of large ships, can be docked directly, the same increases efficiency, all kinds of transported materials, can also be quickly loaded and unloaded, put into the construction of the Ryukyus.