When Fu Yun knew that the Tang army was crossing from the west side of Qinghai Lake, his heart was already cold.

The fact that the Tang army was able to come here without his knowledge means that his troops are all gone.

Fu Yun lay on the ground with a limp.

At this time, a voice kept repeating in his head: It's over, it's over.

Without those armies, Tuyuhun would no longer be able to rule over this vast land.

Even if the Tang Dynasty does nothing next, those Qiang people who have lived here for generations will completely drive out the Tuyuhun people.

Li Jing didn't give Fu Yun much time to accept reality.

He spoke again and said to Fu Yun: "Right now, my Datang has already attacked the entire territory of Tuyuhun in two ways, and I believe that it won't be long before Tuyuhun will be destroyed." ”

After Fu Yun heard this, he couldn't bear this blow anymore.

I saw him gasp sharply for a few moments, and then a mouthful of blood spurted out.

Then his neck crooked and he passed out directly.

Su Lie hurriedly called a dragoon military doctor to treat him.

Fu Yun can't die now, Datang still needs him to sign the surrender document in order to legally include Tuyuhun in Datang's territory.

So far, the war has basically been just that step away.

If Fu Yun dies at this time, it will take a lot more energy.

After a simple post-war cleanup, Li Jing stayed in Fuqi City with the army.

Li Jing asked Su Lie to lead the dragoons to escort Fu Yun, his family, and all the courtiers of Tuyuhun back to Chang'an.

This not only ensures the safety of the road, but also declares that the combat mission of the dragoons has been completely completed.

The Dragoons have already made a lot of achievements here, and it really doesn't make sense to stay any longer.

Therefore, after receiving Li Jing's order, Su Lie immediately set off happily with the dragoons.

At this time, Su Lie didn't know that Li Zhi, who was in Chang'an City, was waiting for him to expand the dragoon army after he returned.

In Chang'an City, Li Zhizheng looked at Li Su with excitement on his face.

And Li Su is seriously telling Li Zhi about the petroleum smelting process he designed at this moment.

Due to other constraints, this process is much more complex than modern processes, and the efficiency is not very high.

But none of this was a problem for Li Zhi.

Because this at least means that Datang already has the ability to refine oil.

Li Zhi now feels very lucky.

actually let him meet a genius like Li Su at the initial stage.

Li Yu was not only able to easily understand the knowledge he imparted, but also had more than ten times stronger hands-on ability than the previous Li Zhi.

With Li Su's existence, Li Zhi only needs to keep looking for research topics and then explain them to him.

As for other problems, Li Su can find a way to solve them by himself.

This allowed Li Zhi to have more time to deal with other things.

Don't waste too much energy to worry about Datang's industrialization.

Next, Li Zhi also needs to supervise the Yan Lide brothers and Yang Siqi and others.

Let them speed up the study of the steam engine.

Only by solving the power problem can the extraction and production of oil be accelerated.

Li Zhi also left himself a task, that is, to rub out a simple generator as soon as possible.

Although he did not know much about other knowledge of electricity, this did not prevent him from putting forward the theory and application direction of electricity.

The appearance of Li Su gave Li Zhi great confidence.

He believes that as long as he puts forward more theories, there will soon be interested people who take the initiative to study them.

In the next few days, Li Zhi was busy.

He first found Yan Lide and asked him to help him make some thin copper wires.

After the improvement of the iron-making process, the copper-making process has also been significantly improved.

Therefore, it is relatively easy to make copper wire.

Then he approached Bakken and asked him to help him refine silicon steel sheets.

It's not very useful at the moment, so Bakken hasn't studied it before.

Therefore, Li Zhi wasted a few days of time with Bakken to study the refining of silicon steel.

Once everything is ready, it's much easier to make a generator.

It only took Li Zhi half a day to make a simple generator.

With the prototype of the generator, the rest of Li Zhi's work was much simpler.

With the help of this generator, he can start compiling a book on what he has learned about electricity, little by little.

Once these books fall into the hands of Yan Lide and others, there will naturally be people who will study them in depth.

Li Zhi was busy opening up new research fields here, but he didn't want his textile workshop to go wrong.

The family's advance ordering of cocoons finally came into play at this point.

The time has entered April, and it is finally the season of spring silkworm spinning.

Pei Mingli naturally had to arrange for people to purchase raw materials for the textile workshop.

However, what he didn't expect was that the cocoons in many places were actually booked in advance.

Not only that, but the price of silkworm cocoons has also increased somewhat because of this operation.

After learning of this situation, Pei Mingli immediately found Li Zhi.

Pei Mingli is also a shopping mall master, so he naturally knows why this situation is.

So he said to Li Zhi: "Your Highness, now it seems that the family has reacted, and I don't know how to deal with it next." ”

Li Zhi said: "First send more people to farther places to receive the goods, and see if we can also sign long-term contracts with some people." ”

Pei Mingli said: "In this way, it is equivalent to head-on competition with the family, I am afraid that it will cause the price to rise sharply!" ”

Li Zhi thought for a while and said: "You go to buy raw materials first, and then this king will find a way to reduce the production cost." ”

Pei Mingli said: "Your Highness, it is better to still focus on high-end silk this year, and the production of low-end silk will slow down for the time being." ”

Li Zhi shook his head and said: "The sharp rise in the cost of silk will inevitably make the price of low-end silk rise together, which will affect the sales of these goods." ”

Pei Mingli said: "Because of this, shouldn't we continue to produce high-end silk? ”

Li Zhi said: "This is not in line with the purpose of this king, what this king wants is to let more people in the Tang Dynasty wear exquisite silk." ”

Pei Mingli said: "But at the moment, it is obviously the price increase caused by the shortage of raw materials, Your Highness, is there still a way?" ”

Li Zhi said: "This king already has some ideas, but he still needs to consult Master Zhang of Sinong Temple, if it is feasible, the problem of raw materials can be easily solved." ”

After listening to Li Zhi's words, Pei Mingli nodded suspiciously, and then said no more.

He knew that Li Zhi was often able to come up with some wonderful ways to solve problems.

But this time, he obviously looked down on Li Zhi.

Because the method that Li Zhi thought of was not complicated.

He just wanted to promote the cultivation of silkworms to the barbarian land in the south and expand the sericulture area of the Tang Dynasty.

This will not only increase the production of silkworm cocoons, but also accelerate the development of the southern region.