Outside the Hanyuan Palace, two huge white marble pillars stand on the road to the Xuanzheng Palace, which is one of the few things in the Daming Palace that uses huge stones.

Li Yuan looked around curiously.

"Kuan'er, are all these floors paved with concrete as you said? It looks very sturdy, too. ”

"Yes, this concrete is not afraid of rain, can withstand heavy loads, and the ground is flat without potholes, which is much faster than a stone road."

Although the stone pavement looks more quaint, in later generations, many retro buildings must like to do so; But in Datang, what else do you need to be quaint?

The whole Chang'an City is full of quaint atmosphere, and the road in the Daming Palace has changed from a stone road to a cement road, which not only does not make everyone feel incongruous, but feels novel and luxurious.

As for Li Kuan, he feels a little incongruous, so what does it matter?

"If you say that, isn't it good to use it to pave official roads?"

Li Yuan is worthy of being an emperor, and he immediately felt the usefulness of the cement road.

You must know that even in later generations, cement roads have become the most important road construction scheme, just like asphalt roads.

If this official road in the Tang Dynasty can be paved into a cement road, the significance is definitely not ordinary.

Why was the rule of ancient dynasties on the frontier always weak?

Inconvenience is a particularly important reason.

Think about it, when the Great Han Dynasty was in power, there was a rebellion in the Western Regions, and by the time the news reached the central government, it might have been several months.

Whatever response is adopted, it does not accurately reflect local needs.

When the army goes out, the daylilies may be cold!

"Emperor Grandfather Shengming, the biggest use of cement is two, one is used to build roads, and the other is used to build houses and fortresses."

"Fortress?"

Li Shimin couldn't help but interject on the side.

The construction of roads and houses is well understood, and there are ready-made examples in the Daming Palace.

But the fortress?

Why do you think there is a lot of information in this?

"That's right, fortress. Especially the border regions. For example, in the past in the Eastern Turks, although the imperial court set up the Yunzhong Governor's Mansion and other government offices to manage, for the vast grassland, the places that can actually be controlled are very limited, and most of them are ruled by various tribes. If a military fort can be built every ten miles, and these military forts can be connected into a line to string together the entire prairie, then the actual influence of Datang on these places will be greatly enhanced. ”

Li Kuan's grassland strategy was only the first step, and he took this opportunity to feel that he could throw out the idea of the second step.

Military forts are not a rare thing in Datang, and they are built in many places on the border.

However, the overall number is relatively limited, and the protection capacity is also uneven.

In the final analysis, it is too difficult to build a military fort on the frontier.

It is time-consuming and laborious, and the cost is too high.

However, with the availability of cement, the difficulty of construction is greatly reduced.

Whether it is gravel or sand, it is easier to obtain than boulders and is inexpensive.

So it was much easier to choose a place with a water source and build a military fort that could accommodate thousands of people.

If there is a concrete road that connects these Ejun forts all over the grassland, it is like a chain that locks the steppe.

Once something happens, Datang can respond quickly.

Moreover, these military forts can also be regarded as a powerful boost for the extension of the commercial tentacles of various Tang Dynasty such as Northwest Trade.

"You sort out your thoughts and write an excerpt for me. When the time comes, let the military department and the household department discuss it together to see the feasibility of this plan. ”

Although the main topic of today is not political affairs, the topic has changed while talking, and there is no way to do it.

Li Yuan followed Li Kuan in Daming Palace for most of the day, until he felt a little tired, he returned to the palace to rest, and the ministers from all walks of life reluctantly left the Daming Palace.

That night, Li Yuan lived in the Daming Palace, and this new palace was officially opened.

……

In the Taiji Palace, Li Shimin stayed in the imperial study to review today's recital.

Yesterday, after walking around the Daming Palace, Li Shimin's whole person became very excited, but after being excited, he found that the Taiji Palace was compared with the Daming Palace......

Then, Li Shimin had insomnia at night!

Finally, after the court meeting today, Li Shimin actually wanted to make up for a while, but the strong inertia forced him to continue to come to the imperial study to continue to review the folds.

Although it was not cold in the imperial study, it was compared to the situation in the Hanyuan Hall yesterday......

Li Shimin felt that he couldn't sit down anymore.

Recently, my father's body doesn't seem to be very neat, and I worked hard all day yesterday, do I want to go and see him?

Li Shimin couldn't help but have this thought in his heart.

There is also the concubine of Chu State, listening to the Guanyin card, her body is not as tough as before.

Although national affairs are important, filial piety also seems to be important?

What to do?

Why don't you let Lan He take these folds and go to Daming Palace to see his father and concubine, and then review them in Hanyuan Hall for a while and then come back?

With this thought in his heart, Li Shimin couldn't sit down even more.

"Lan He, you send someone to Daming Palace to see how the Emperor Taishang is doing today, and if there is anything abnormal, come and report to me in time."

Li Shimin finally held back, took a deep breath, and continued to work.

A day passed......

Two days passed......

Three days passed......

After hearing Lan He say that the Emperor seemed to sneeze a few times today, Li Shimin finally felt that he needed to go to Daming Palace to visit.

Filial piety comes first, and I am also an example for hundreds of officials!

Li Shimin kept saying this to himself in his heart, and soon, the royal car came to Daming Palace.

"Erlang, why do you have time to come and see me today?"

Li Yuan was in the Penglai Pavilion, watching a group of dancing girls dance, and the concubine of Chu State was sitting beside him.

Since living in Daming Palace, Li Yuan's opinion of Li Shimin has changed greatly, and he no longer thinks about many things that have happened.

If you think about it, it's in vain, and you want to worry about yourself.

"The son came to greet his father, and I heard that my father had a little cold, so I came to take a look."

Li Shimin was relieved to see that Li Yuan's mental state seemed to be good.

At this moment, Li Shimin hopes that Li Yuan can live a little longer than others, so that he can see the scene of Datang thriving in his hands, and he can also prove from the side that his original choice was right, and it was for the sake of Datang's future generations.

"It's okay, it's just that I don't wear much in the house, and when I went to the balcony, I got the wind and coughed a little bit, so it didn't get in the way."

"Erlang, although this Daming Palace has only been built in the first phase, the palace area is already larger than the Taiji Palace, and all parts of the front palace are basically abandoned there, if you don't feel troublesome, you can also move to the front palace, in winter, it will be more comfortable to stay."

The concubine of Chu State made a suggestion, which made Li Shimin's heart flutter.

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