The Chu Prince's Mansion was moving very quickly.

Wang Fugui went to Yanchang County in person to prepare for a large-scale purchase of land.

Li Kuan went to the Summer Palace and proposed to Li Shimin the cement road to build a cement road directly to Dingxiang City, the capital of Zhenbei Road.

For a long time, in order to reduce investment in Zhenbei Road, the imperial court broke out a cement road from Shuozhou to Liangzhou to pick up Dingxiang City.

In this way, the cement road that needs additional construction is very short.

However, this will also cause the time for Chang'an City to go to Dingxiang City to more than double.

Before this, most prefectures and counties north of Chang'an City had a weak sense of existence and economic development was even worse.

Therefore, the cost-effectiveness of building cement roads in these places is relatively low.

However, now that Yanchang County's tincture oil resources have the significance of large-scale mining, the situation is naturally different.

The cement road is directly built from the north gate of Chang'an City, connected to Yanchang County, and then continue to head to Dingxiang City, which can directly drive the economic development of this journey.

In particular, along the way, you will pass through the iron smelting workshops and large coal mines set up by the Chu King’s Mansion in Zhenbei Road.

From this perspective, this cement road is still very constructive.

"Kuan'er, the imperial court has just announced the start of construction of cement roads from Luoyang to Guangzhou. Now you have proposed to build cement roads from Chang'an City to Dingxiang City. Isn't this a bit exaggerated?"

In the Summer Palace, Li Shimin was speechless after hearing Li Kuan’s proposal.

He naturally knew that building cement roads is beneficial.

However, Li Shimin still had a little difficulty in accepting this kind of continuous large-scale construction.

The main reason is that the money spent is too much.

The civil and military officials of the court who were not used to owe money obviously could not accept the Ministry of Revenue borrowing from the Tang Dynasty's Royal Money House all day long.

After all, the annual loan interest is also an extraordinary number.

"Your Majesty, time is not waiting for me. While my Tang Dynasty was in a strong state, I would thoroughly implement the grassland strategy so that the entire south of the Yellow River would become the residence of Han people as the main residence.

It is very necessary to further strengthen the central court's control over Zhenbeidao. You don't want to leave these problems to future generations to deal with, right?"

Most people dare not say such words.

However, the relationship between Li Kuan and Li Shimin is quite special. If you talk about it occasionally, you can't say that you are not a taboo.

"Your grassland strategy has been mentioned to me for more than ten years. Why can you mention the grassland strategy every time you have something to do with grassland?"

Li Shimin also looked at Li Kuan speechlessly.

He did not deny the grassland strategy proposed by Li Kuan back then.

Because at least from the current situation, the situation on the grassland is still very stable.

With the strengthening of the Tang Dynasty's actual control over the grassland, each tribe has obviously become more peaceful.

In addition, many Han people have gradually found ways to make a fortune on the grassland, and they are no longer so resistant to moving to the grassland.

In other words, many grasslands have gradually become fertile fields.

For example, the grassland in the northern part of Shuozhou has now become a cotton field.

The area where these cotton fields are located has completely broken away from the grassland.

As the scope of cotton fields continued to expand, it meant that the Tang Dynasty continued to erode the originally ruled areas of the Hu people.

In addition, the Tang Dynasty had a strong military strength and could continuously promote the strengthening of national strength through various trades. Once this positive cycle was formed, it would not change in a short period of time.

At least in the next twenty years, as long as the Tang Dynasty does not commit suicide, the Hu people on the grassland will not even dare to make trouble easily.

"Your Majesty, I am not making excuses. It is really inconvenient to go to Dingxiang City in Chang'an City. This is still Dingxiang City is located south of Zhenbei Road, close to Guannei Road.

If you go to the north of Zhenbei Road, you will have no idea how much time it will take.

If Chang'an City can build a cement road leading to Dingxiang City, then the passage time can be shortened to about ten days, which is absolutely of great significance to the Tang Dynasty.

Even if there is any change in other places in Zhenbei Road, the army can arrive in the shortest time.

Of course, the most important thing is that Zhenbei Road is not as barren as we imagined. Whether it is an iron ore or a coal mine, it is richer than in the pass.

Now, Guanshishan Academy has even a prospecting team, which has been stationed in Zhenbei Road for a long time. Maybe when will copper or gold mines be discovered there?

In addition, this road can connect Yanchang County and other prefectures and counties to utilize local resources. This is also of great significance to the development of hunger in the various directions of the inner road of the Tang Dynasty."

Li Kuan will not dislike too much of cement roads.

The best way is to connect all the prefectures of the Tang Dynasty with cement roads.

Anyway, there is still a lot of room for improvement in cement production capacity in this era.

"You mentioned Yanchang County many times. Could it be that there is something special here?"

Li Shimin is not that easy to fool.

Soon, he found clues from Li Kuan's words.

"Your Majesty, don't you know that you read the latest issue of Science magazine?"

"I browse it, what? Can this matter still be linked to Science magazine?"

Li Shimin admired Li Kuan's ability to talk nonsense.

Over the years, it seems that no matter what Li Kuan said, he can finally make up for himself.

I was inexplicably convinced in the end.

"In this journal Science, an article published by Rao Yongxiang, dean of the Chemical College of Guanshishan Academy, expounded the significance of tinder oil refining and the development of related industries.

The main turmeric oils in our Tang Dynasty were collected from Yanchang County.

If the scale of tinder oil collection is to be expanded, it would be very meaningful to build a cement road to Yanchang County."

"There are other uses in addition to making sulphur bombs?"

Although Li Shimin will browse every issue of "Science" magazine.

But he has a lot of trouble after all, so he can't read every article seriously.

So although he had an impression of the article on tinea oil, the deep meaning behind it was definitely not as clear as Li Kuan could see.

"Yes! After tinder oil is refined, you can get a product that is very suitable for lamp oil. Using this lamp oil will not only cost much lower than whale oil candles, but also have no worse effect than whale oil candles.

The most important thing is that this lamp oil is more resistant to burning and has the hope that ordinary people can afford it."

Li Kuan didn't hide anything from Li Shimin.

The fact that the Chu Prince's Mansion arranged for people to go to Yanchang County to purchase a large amount of land must not be concealed.

Instead of making Li Shimin unhappy then, it is better to explain it now.

“So you want to expand the extraction of tin oil?”

"That's right!"

"So you want to build this road, is it a plea to make private contributions?"

Li Shimin's face was a little unhappy.

No one wants to be exploited.

"No, this is not a fake public service for personal gain, it is promoting the economic development of the Tang Dynasty!"
Chapter completed!