Speaking of which, it has been almost half a year since Xiao Heng fell from the sky.

In the past six months, Xiao Heng has experienced many things, and has gone from having nothing to having enough to now have more than a thousand people of all sizes... This is almost at an ordinary middle school level.

Whether these people are the workers who are engaged in the most basic work or the children in the school who are still learning addition, subtraction, multiplication and division, each of them is the seed of the future. Perhaps among these people, national heroes or great scientists will appear that will be admired by generations... Everyone is so precious that Xiao Heng is reluctant to let them go of any accidents.

As for the high wealth accumulated by Xiao Heng during this period, it is nothing. Whether it is a factory, a private house or the "magnificent" Lin'an Grand Theater, it is something that can be abandoned at any time compared to these seeds.

So, how can we evacuate these thousands of people and the more people that may be added later to the relatively safe Sichuan Prefecture in a very short time?

First of all, the premise of everything is...information.

If there was no intelligence, it would be like this time the Jin people quietly robbed south... they would only learn the news when they arrived at the city, and it would be too late.

So intelligence is very important.

Xiao Heng wrote the word "Information" on the paper. After writing it, his pen paused slightly and then drew "{" behind these two words.

When it comes to intelligence, of course, it is necessary to establish an informant system. The size of this system depends on financial resources, while reliability depends on loyalty... at least in this era.

Size depends on financial resources, and is there any way to increase the reliability of intelligence besides loyalty?

The answer is of course yes. According to the experience of the intelligence system of modern countries, in addition to loyalty, scale and system can also be compensated.

As the scale is larger, there are more channels for obtaining intelligence. The same intelligence is often transmitted from different channels. After multiple verifications, the authenticity of this intelligence can naturally be clear. The system can ensure that the transmission of intelligence between various channels will not affect each other.

Xiao Heng slowly wrote down the words "informer" and "system" after the word "information". After writing it, he thought about it and wrote down "time limit".

In modern times, many intelligence is time-sensitive... Often, if the information obtained is ineffective if it is a period of time or even a few hours at night.

With the development of modern cryptography, theoretically any encrypted intelligence can be deciphered, but the length of time... Then why do you still need to encrypt it? It is very simple, that is, to increase the other party's deciphering time to give one's own side a chance.

The speed of password cracking and encryption methods are spiraling up, especially after the birth of computers, various encryption methods have begun to develop in a crazy direction...

In the Southern Song Dynasty, the timeliness of this information was much worse. It was possible that there were delays of one or two months or even more than half a year... And despite the delay for a long time, most of the information was still useful!

Xiao Heng picked up the pen and added a "—" after the word "time limit" and wrote the word "telegram".

However, after writing these two words, Xiao Heng paused and thought for a while, crossed out the two words and rewritten a few words: "Long Wave Radio".

Indeed, long-wave radio stations are much more reliable than wired telegraphs. Even if wired telegraphs are buried underground, someone will probably steal them. After all, copper in this era is much more valuable than later generations! Even if Xiao Heng has the ability to lay lines, he does not have the energy to set up a patrol team to protect the wires every day. The technical difficulty of long-wave radio stations is not high, and it can be easily manufactured under existing conditions.

However, long-wave radio is not without its shortcomings, that is... expensive.

The transmitter tower of the long-wave radio station is very large and very high. The transmitter consumes huge power and requires a lot of manpower and material resources to build and maintain.

Moreover, considering that it is difficult to build a long-wave radio station in the enemy-occupied area, Xiao Heng added an asterisk behind the long-wave radio station and wrote the four words "Middle Wave Radio" below.

Compared with long-wave radio stations that can be transmitted through the surface and have an effective distance of hundreds of kilometers, medium-wave radio stations need to reflect the ionosphere in the sky, not only has a great distance shortened, but also is affected by various weather conditions.

However, the advantage of mid-wave is that the requirements for antennas and power are not that strong. With Xiao Heng and his current technical capabilities, it is estimated that it will be no problem to make an antenna that can be installed in a four-wheeled carriage.

After writing the sub-item under "Information", Xiao Heng pinched his temples, stood up and looked at the green in the distance...

What is written on this piece of paper is not only future strategies, but also the technical difficulties that Xiao Heng will overcome next... In a sense, this is Xiao Heng's second future technology tree to plan, but this time it is much more complicated than the last time.

After a little rest, Xiao Heng returned to the table again, picked up his pen and wrote down the second essential technology for escaping - means of transportation.

Yes, the four-wheeled carriage is already excellent enough now, but the biggest problem Xiao Heng faces is not the carriage... As long as the fire in the blacksmith shop is not extinguished, this kind of industrial product will really be as much as you want! As long as Xiao Heng is willing to produce at least 2 four-wheeled carriages every day!

The reason why Xiao Heng had this confidence was entirely because their blacksmith shop had basically completed the assembly line operation... After the steel water was made, it would be tied into steel plates and pulled into steel wires.

Later, special workers cut steel plates to make it into standard channel steel, angle steel, etc.

The channel steel and angle steel are then cut, and the drill holes are turned into standardized parts, and finally they are assembled and can become a fast four-wheeled carriage!

This is because Xiao Heng did not recruit workers on a large scale to expand production... If it were traditional handmade, such a four-wheeled carriage with complex structure would take at least half a year to complete. In Xiao Heng's factory, it would only take half a day to flash from the original project to the assembly, or even the final interior decoration!

This is the power of industrialization.

Since carriages are not a problem, why doesn’t Xiao Heng make large quantities now?

The reason is very simple... it is horses.

The Southern Song Dynasty lacked horses, or... all Central Plains dynasties lacked horses.

Once upon a time, the Sixteen Prefectures of Yanyun were abundant in water and grass, which was a good place to release horses. Unfortunately, the Sixteen Prefectures of Yanyun, which had been longing for several generations of emperors of the Northern Song Dynasty, did not return to their hands after all, and in the end even the entire Jiangbei was thrown away.

Just as the Central Plains dynasty would restrict the export of salt and iron, nomadic peoples rarely sell war horses to the Central Plains dynasty... But without war horses, the Central Plains dynasty would at most be a good place to stand on their own and protect themselves, while nomadic people would die without salt and iron! Therefore, nomadic people have been exploited by the Central Plains dynasty for a long time and have been miserable.

But just like the Da Liao method will still be repeated after the Jin Dynasty came to power, if the Central Plains dynasty exported unlimited amounts of salt and iron, a powerful unified country would soon appear on the grassland... By then, the demise of the Central Plains dynasty would be just around the corner.

So, this is a ring, a cruel and reincarnation that has to be repeated infinitely.

Xiao Heng suddenly realized that his thinking had begun to wander again, and he had to calm down his mind and start thinking about the problem of transportation again.

There are two ways to put Xiao Heng in front of him: one is to replace animal power with steam power, and the other is to build ships.

The steam engine can be said to be the first time that humans can efficiently use the chemical energy stored between heaven and earth... It can be said that the invention of the steam engine is an opportunity for human industrialization.

But Xiao Heng did not have to define his scientific and technological tree according to the historical human development route... After all, internal combustion engines and steam engines are completely different technical routes, and there is no decisive front-and-back relationship. He can completely skip the steam engine to develop internal combustion engines directly.

However, after thinking for a long time, Xiao Heng finally wrote the words "steam engine" on the paper.

As for the reason, it is very simple - without oil. To be precise, the oil production in the current Southern Song Dynasty could not withstand the consumption of internal combustion engines.

Generally, the normal pressure extraction rate of crude oil is about 40%, including about 10% gasoline and about 30% diesel, and the remaining is normal pressure residue.

Due to the current technical conditions of the Northern Song Dynasty, catalytic cracking towers were not built, and atmospheric residual oil could not be converted into fuel... So after crossing mountains and ridges, the oil from several tanks was only enough for several household vehicles to burn! With such a small output, I am afraid I would not be dreaming about transporting thousands of people to one or two thousand kilometers!

Relatively speaking, steam power is much simpler. Not only can the manufacturing tolerance be appropriately amplified, but the acquisition of fuel is also much simpler - the steam engine does not pick on fuel, as long as it can burn anything!

This will make it easier to replenish fuel along the way... Moreover, once the steam engine technology is mature, it can be used in many other aspects. It is no wonder that so many time travelers regard the steam engine as the most important technological node.

In this era when various supporting facilities are underdeveloped, steam engines are far more practical than internal combustion engines, whether for ease of use or other considerations.

But the volume and weight of the steam engine... can the pavement and bridges of this era bear it?

Xiao Heng's pen tip stayed for a while, and then drew a question mark behind the steam engine.

Waterway is obviously a better choice than a steam engine and a four-wheeled carriage.

Shipbuilding technology during the Southern Song Dynasty was already quite developed, otherwise there would not be a large amount of maritime trade... and there is another advantage of maritime transportation, that is, it is to have a large quantity and keep full!

Not to mention a few more than a thousand people, a large ship can be almost ready for such a few people... If we consider the employees recruited in the future and some related households that need to be taken away from Lin'an, then it is enough to calculate three large ships of the treasure ship level.

Under the current technical conditions, to build a large ship, not only requires very huge wood, but also skilled workers and shipbuilders... Among them, wood and shipbuilders are the most important.

How to build a big ship at this time is still a secret technique that is passed down by men but not women. Many hull structures are passed down by generations of shipbuilders... Unlike later generations of Luban locks that have become children's toys, the techniques contained in various Luban locks in this era are more important than life!

But... what is missing in modern times, the most undesirable is knowledge.

It is so happy to be born in an era of information explosion. As long as you are willing to learn, you can find any information. Spending a little money to sign up for a class can greatly save energy and time...

...So the shipbuilder is not a problem for Xiao Heng, and he doesn't need big wood. With their current metal processing methods, they can already create very huge metal parts, and then they can just lay the metal keel directly.

So what restricts Xiao Heng is actually the most ordinary skilled workers. As long as there are enough skilled workers, Xiao Heng can build a very huge sailboat in a short time.

As for the sailor...

Thinking of this, Xiao Heng couldn't help but frown deeply.

In this era, sailors can basically be equated with "pirates". Even if the most honest merchant ships encounter opportunities, they will never miss the fat meat they have... So it is too difficult to recruit a group of reliable crew members.

Steam engines and sea boats have their own difficulties.

Xiao Heng sighed and added two words behind the shipbuilding: "Sailor."

The thinking on land and sea transportation can be temporarily concluded. So in extreme cases, such as the Mongols have already moved south, how can they evacuate safely?

Xiao Heng wrote down the last two words on this piece of paper: force.

Compared with the Jin people, the nation on the horse's back has no shortage of mounts, and almost everyone can play tricks on the horse's back!

Even if the Jin people go to learn, they will not fall to death if they are hiding in stirrups! Not to mention the Song people of the farming nation... Xiao Heng estimated that even the Song people who practice martial arts since childhood, the Song people who have been practicing martial arts since childhood would not be as good as the Meng people.

Then to fight against the Mongols, you must first not lose in mobility and flexibility. Otherwise, even if there is a large-scale war king and the guardian of truth, the artillery, will suffer a great loss when encountering field battles.

So how can we not lose weight in mobility?

In fact, Xiao Heng had already had some ideas before, otherwise he would not have built a bicycle... His solution has something to do with bicycles, and it is considered an advanced product of bicycles - electric bikes.

Adding electric motors and batteries to the bicycles becomes the most basic battery car.

Among them, the difficulty of the battery is very low - lead-acid batteries are enough. Although the manufacturing method of sulfuric acid is somewhat dangerous and difficult, this process has long been broken by ancient sorcerers.

The technical difficulty of the motor body is actually not high, mainly on the winding line... The most technically difficult one is the permanent magnet on the motor.

In the Southern Song Dynasty, Xiao Heng had no place to find modern high-performance magnets... Modern high-performance magnets generally added rare earth elements, and the smelting of rare earths cannot be replaced by native methods. However, Xiao Heng's solution is also very simple: just online shopping, after all, the amount of this thing is not used much, and his savings can still be supported.

After the mobility is solved, all the problems will be solved - after all, Xiao Heng is a man who controls the "truth".

"call……"

Looking at the technology trees that need to be opened on the long list in my hand, Xiao Heng will definitely not be idle in the foreseeable future.
Chapter completed!