As soon as he entered the door, he saw Xu Guangqi looking at him eagerly, Wang Yisi suddenly shuddered and spoke.

"Minister. I've seen Your Majesty. ”

"Hmm... Aiqing also sit down first, I have invited you to come because I have something important to discuss with you. ”

"I gave you a book on agricultural machinery before, do you remember?"

"I also asked you if you could develop this kind of farming machine powered by a steam engine as soon as possible."

After Zhu Youzhen finished speaking, he looked at Wang Yisi who was sitting in the lower seat with anticipation, and heard Zhu Youzhen's words.

Wang Yisi's face was stunned, and he said with some embarrassment: "Your Majesty.. The problem of this agricultural machinery: . It may take some time to develop. ”

"Why? Didn't I give you a book of guidance? ”

"Yes, yes, yes... Your Majesty, but this kind of agricultural machinery was found when we developed it, until now we can not find a substitute for rubber, not to mention that the rubber required in the agricultural machinery atlas must not only have great wear resistance, but also have strong stability... Minister.."

Speaking of this, Wang Yisi felt that his face was a little burning.

As a member of the Daming General Administration of Industry, who is now from a deputy to a regular position, he holds perfect drawings and technologies, but he is stuck in his throat by material problems.

It made him extremely uncomfortable.

But when these words were spoken, Zhu Youzhen woke up in an instant, only to hear him speak: "If that's the case... I understand, Aiqing waits. ”

With that, he turned around and walked from the council hall to the library where the dragon case was usually placed, and slowly groped in a drawer on the bookshelf.

In fact, thoughts have already flown into the system in the brain.

In the exchange mall inside the library system.

Zhu Youzhen is constantly thinking about what kind of pre-technology should be exchanged to solve the peerless problem of rubber that cannot be used.

After all, before the invention of the serious tractor.

It stands to reason that it was born after the basic rubber industry has developed to a certain extent.

But now Zhu Youzhen urgently needs this kind of agricultural machinery, especially the tractor responsible for cultivating farmland.

From now on, we can start to study from petroleum to industrial rubber, not to mention how difficult the industry involved is, just these technologies, Zhu Youjian's remaining system points cannot be exchanged.

What's more, Daming has no talent in this area at all.

It's just that when such a problem is in front of Zhu Youzhen, and he urgently wants to find a technology that can replace the tractor in the system's exchange mall.

Suddenly, I noticed that a book appeared in the exchange mall.

"Natural Rubber Vulcanization Technology"

At this point, Zhu Youzhen's memories were vented out like an open floodgate.

In later generations, when industrial rubber had not replaced natural rubber on a large scale, how to make natural rubber into rubber tires by means.

The most critical step is to vulcanize the rubber, so that the treated natural rubber can even achieve the same efficiency as the rubber extracted from industrial petroleum in later generations, and even better than industrial rubber in many indicators.

Zhu Youzhen, who didn't think much about it, decisively spent 1 point in the system to redeem it.

But after the exchange, his brows furrowed again, if it is said that the restriction on the development of steam tractors is whether the quality of rubber can meet the demand.

Then the overstretched rubber production of the Ming Dynasty may continue to limit the output of the Ming Dynasty's steam tractors in the future.

After all, in the current Ming Dynasty, all rubber production comes from overseas purchases without exception.

Although the Dutch East India Company has never had any opinion on this, Zhu Youzhen knows that once the special significance of rubber is excavated, then there is no need to think about it.

These profiteers from the Tessie countries will do everything they can to raise the price of rubber.

So as to control the price of natural rubber to block the pace of Daming's industrial development.

Zhu Youzhen pondered for a long time about this, and the ministers in the council hall saw that Zhu Youzhen was gone and did not return for a long time.

For a while, I also had mixed feelings in my heart.

It's just that it didn't take long for Zhu Youzhen to walk out of the study on the side and return to the meeting hall of Dongnuan Pavilion.

The place where he was sitting just now has been replaced with the Longjing tea that has just been brewed, Zhu Youzhen gently blew the hot tea, took a sip and said again.

"Wang Aiqing talked about the rubber problem before, I do have a solution here, so that the liquid flowing out of the rubber tree can be turned into wheels that can be used by the Ming Dynasty."

When Wang Yisi heard this, his face was overjoyed, and he arched his hand in his seat and said.

"If that's the case, then there's no problem with the plan to hang a rotary tiller behind a steam tractor."

But Zhu Youzhen knew the problem behind this, so he shook his head, and he said leisurely again.

"Does Wang Aiqing know where the rubber of Daming comes from?"

Wang Yi was stunned for a moment, and after thinking for a moment, he hurriedly replied: "Now most of all the rubber in Daming comes from those Taixi caravans that came to Daming to trade, and the most sold rubber to Daming is the Dutch East India Company. ”

"Aiqing, do you know what's behind this?"

As Wang Yisi, who has been studying technology and innovation all day, where did he understand this truth, but Xu Guangqi, who knew a lot about the Taixi countries on the side, suddenly reacted.

He opened his mouth and said, "What Your Majesty wants to say is not the purchase of rubber?" Now all the rubber in the Ming Dynasty is in the hands of others, once the Taixi countries restrict the rubber trade of my Ming Dynasty, then even if there is a great ability at that time, I am afraid it will be difficult to develop the so-called agricultural machinery smoothly. ”

Zhu Youzhen nodded, cast an appreciative look at Xu Guangqi while drinking tea, and spoke. 、

"What Xu Aiqing said is the question I am thinking about now, don't look at the businessmen of the Taixi countries who are now pretending to be obedient to me on the surface, but once they touch their interests... At that time, Da Ming will be passive. ”

"I don't think the Dutch East India Company will have such guts, after all, they still rely on the trade of the Ming Dynasty?"

Wang Yisi was a little puzzled, after all, when he was in the Royal General Administration of Industry, once he needed something, he had nowhere to look for it.

The caravans of the Taixi countries will take the initiative to send people over to solve their problems and provide them with a variety of raw materials for them to choose from.

And every time the Tessie merchants came to the Royal Industrial Authority, they had a better attitude than one another, for fear that they would not buy their things.