Today, the main focus of Yefeng is on development.

The first is the increase in population.

Although various tax cuts have yielded a bumper harvest this autumn, the new population is not so impressive because of the backwardness of farming and medicine.

In the future, the territory of the Sui Dynasty will continue to increase, and people are required to live and develop.

Otherwise, the benefits of the night breeze are only a small part, and the prosperity of the country is the long-term benefit.

The expansion of the army is also important.

All this points to the same starting point, technological development.

After handling his government affairs, the night wind disappeared from the imperial official and flew to the earth.

The earth and planet V1 are in the same universe, and Ye Feng is now at the level of Xuanxian, so it is not troublesome to come and go.

To increase the population rapidly, we must rely on the development of science and technology.

The development of science and technology cannot be achieved overnight. After all, the ancient people did not have as much knowledge as the modern ones, and things that were too complicated, we still have to give them time to learn from the shallower to the deeper.

At present, it is mainly concentrated on three simple aspects.

The first is agriculture.

The people rely on food, they can’t get enough to eat, no matter how large the new population is, they can only starve to death.

Secondly, dressing is indispensable for both warmth and fullness.

This requires enough productivity to grow cotton and other crops and make them into clothes and cotton backs so that people will not be frozen to death.

Because of the protection of dragon veins and the promotion of chemical fertilizers, the production of crops in the Sui Dynasty has been very high, but the productivity cannot keep up, and a lot of fertile fields have been abandoned.

The water buffalo in the Sui Dynasty was not enough. In many cases, people had to dig the fields with hoe.

In response to this situation, Yefeng decided to make two-handed preparations under the suggestion of the system.

First, use artificial insemination technology to speed up buffalo reproduction.

Second, get diesel engines to drive easy-to-operate farming machines and harvesters.

As for the source of these, the first thing is to buy naturally, and return to the earth to buy.

After buying it, let people slowly learn how to make it independently.

As for power, the planet also has oil. Just buy a few sets of mining equipment and return the refining equipment.

The second is textile technology. The electric small textile machines that are quickly eliminated by modern times can greatly speed up the spinning speed.

Then there is medical treatment.

In this era, there are still too many people who die because of diseases, and the proportion of newborns who die is also very large. Even in many cases, mother and child die together.

This problem must also be solved. The equipment required for caesarean section is the first to bear the brunt, and the more complicated ones will be discussed later.

It didn't take much time for the night wind to enter the space, and under the guidance of the system, it flew to the earth continuously with the help of the planetary orbit.

Although the earth and planet ⅴ are in the same universe, they are very far apart.

Ye Feng's current Profound Immortal-level speed, coupled with various leveraging methods, took three full days to fly before seeing the earth.

Looking at the azure planet in front of him, Ye Feng had mixed flavors in his heart. Once upon a time, he was also a member of this planet, running for his livelihood. Now all the changes are too great.

After a moment of emotion, the night wind rushed in towards the earth.

After entering the atmosphere, Ye Feng went into a state of invisibility immediately, so as not to be discovered by various countries, he just came back to buy some things, and didn't want to be watched by aliens or even go to war.

After passing through the atmosphere, the night breeze landed on Tianbei in Shenzhen, and changed his outfit before appearing in the crowd.

Now he has no modern currency, but he has real money.

The price of silver is a few yuan per gram, and the transaction volume is too large.

The price of gold is quite impressive. Sell gold before buying things.

Tian Bei has a jade and gold trading place. Some people have identified it. There is no doubt that the gold is sold in large quantities. It is suitable.

Prior to this, Yefeng first used the system to network and inquired about today's gold transaction prices.

In the end, in a certain Fu's recycling shop, the price was 260 yuan per gram, in exchange for 300 million in cash.

As soon as the money got in hand the next day, Ye Feng went directly to the machinery market.

With these things, electricity, and some training, the subsequent machines can be produced by themselves.

Of course, these equipments are not numerically controlled, but hand-controlled. After all, numerical control is a little more complicated and inconvenient to maintain.

After buying these, Ye Feng went to the agricultural machinery market and bought back 10,000 small machines for farming.

However, only one thousand large harvesters were bought.

Finally, there is a small electric textile machine, which is cheap, and it costs more than 2,000 to get it.

There are only a thousand sets of simple medical devices that must be used for abdominal delivery.

Then there is power generation equipment, and only a large set is needed.

For this set of equipment, the night breeze requirements are not high, as long as the electric equipment can be operated.

As for electricity for civilian use, I will say it slowly from now on, and there is no need to worry at all. Even if it will be more than a few hundred years before universal electricity is used, it does not matter.

Yefeng's crazy purchase has also attracted the attention of a large number of merchants. Faced with such large customers, they all want to win over.

However, Yefeng didn't intend to have too much intersection with the earthlings at all, so he could deal with it.

Finally, it is the equipment for oil extraction and refining.

This equipment is generally directly controlled by the state, after all, it is basically mined by the state.

Ye Feng didn't know where to buy it, so he could only steal it. This was something he hadn't thought about before, but now, there is no way.

As a major oil exporter, Xiong Country has a lot of equipment, and Ye Feng directly stole all of its equipment in a large oil field.

At the same time, because Ye Feng didn't want to train slowly by himself, he easily caught hundreds of technicians, who were all from the celestial dynasty.

After all, Yefeng wants them to help with work and communicate well in language.

People from all walks of life have caught almost a hundred, and they are all locked in the virtual space. With Ye Feng's current cultivation base, there is no need to worry about these people being suffocated.

There is no doubt that the theft of Xiong’s oil extraction equipment and the disappearance of hundreds of technicians from various industries in the heavenly dynasty immediately became world news.

Combined with the large purchases made the day before Yefeng, those who have a bigger brain have connected them together.

It's just that all of this is not important to Night Wind. After recording the large domestic hydropower stations and oil fields, he left the earth and returned to his own world through the way he came.

After another three days of flying, Yefeng once again landed on the emperor of the Sui Dynasty.

The abandoned river, in a weird way, counter-currents a mountain.

Below, the land was continuously excavated by beams of mana.

At the original downstream exit of the river, a dam made of reinforced concrete is taking shape.

The time is now the fifth day after Ye Feng came back.

As soon as he came back, what he decided to do was to repair the hydropower station and start generating electricity.

The construction of a hydropower station can be regarded as a big project. If ordinary migrant workers are allowed to build it, it will take some time.

Now that he was anxiously waiting for electricity, Ye Feng had done something to kill chickens with a sledgehammer once.

After selecting the location of the hydropower station, Yefeng asked the system to construct blueprints that people in this era can understand, and set about letting the people who have become immortals under them to build the hydropower station by themselves.

Under the order of the night wind, Youquan Gorefiend was responsible for the manufacture of cement.

The fairy fire spirit is responsible for the refining of steel.

The little water baby drains the water.

Baimei, Guyue, Xingzhe, Mu Lingzi and others brought some heavenly soldiers to excavate and build the dam.

The remaining part of the heavenly soldiers is responsible for handling the refined steel and cement.

Thanks to the efforts of many powerful subordinates, a medium-sized hydropower station was completed in five days.

The layout of the warehouse, the installation of power generation devices, and other things that require professional knowledge were handed over by Ye Feng to the technicians who brought them back, and they were assigned manpower, and everything was carried out under their guidance.

These people were terribly scared when they were let out by the night wind.

After Ye Feng explained, they also slowly discovered that Ye Feng was really not malicious to them, and then they slowly felt relieved, and the treatment Ye Feng gave them was really good.

These technicians are on the earth, and the salary is not too high. After all, many industries are about relationships. It is not that you have the ability to get high income.

The treatment given to them by Ye Feng started with an annual salary of 1,000 taels, and the main brain of it even gave them an annual salary of 3,000 taels.