Li Zhan was watching the workers install the mobile board house in the square at this time, and now the partition is made of balsa wood, Li Zhan wants to try the effect of sound insulation and sound amplification.

And just after the board room was successfully installed, Li Zhan suddenly heard a voice behind him.

"Zhan'er, who do you see coming to see you?"

Li Zhan heard that it was the voice of the eldest grandson Wuji, so he also looked back, but he didn't know if he saw it, and he was startled when he saw it, it was actually Li Shimin who came, why did he come here?

Before Li Zhan could calm down, he immediately heard a voice from the board room: "Big brother... Hear me? ”

The sound is very loud, it can be transmitted for hundreds of meters, this is the sound amplification effect in the board room, this effect makes Li Zhan very satisfied, and Li Shimin on the side is also very surprised: "This sound is made by Cheng Qian in the house, the sound is very loud, I don't know if Cheng Qian has the strength to shout loudly inside, and can you hear the sound outside inside?" ”

After Li Shimin finished speaking, he walked to the board room and wanted to go in to have a look, but Li Zhan and the eldest grandson Wuji immediately accompanied him.

Li Chengqian continued to say inside: "Big brother, can you hear what I said, you can't hear anything inside, you can only hear your own voice, big brother... Is there any sound outside? ”

Just when Li Chengqian was smiling happily and talking inside.

The door of the board room was pushed open by Li Shimin, and Li Shimin said: "I can hear what you say outside, and it's very noisy." ”

Li Chengqian was about to reply with a smile: "Yes...!" But when Li Chengqian saw Li Shimin, Li Chengqian was stunned at first, and then he was about to call his father, but fortunately, Li Shimin waved his hand directly to Li Chengqian and asked: "You just said a lot of things, are you really inaudible?" ”

Li Chengqian looked at his father and said with a little trepidation: "Yes... Be... It's inaudible, that... Can I be heard outside? ”

"It's clear... And it's loud, okay... It's really good...! Li Shimin showed a smile and looked at Li Zhan behind him and said, "You did a good job, really good...!" ”

The eldest grandson Wuji looked at Li Shimin praising Li Zhan, and also walked up and said, "This is not the place to talk...!" ”

After the eldest grandson Wuji finished speaking, Li Shimin understood, he looked at Li Chengqian on the side and smiled: "It's also... Then let's go to your house in Dunhuafang and sit down...! ”

"Yes...!" Li Chengqian lowered his head, and then looked at Li Zhan secretly, while Li Zhan could only smile, in front of Li Shimin, what could he do?

After a while, the group came to Li Chengqian's five-story building.

At this time, Li Chengqian's five-story building had been built, Li Shimin stood in front of the five-story building, looked at the small building about fifteen meters high, nodded slightly, and said: "This earthquake actually did not collapse such a tall small building, which can be seen the practicality of cement."

Auxiliary, in the future, we will also let the Ministry of Industry vigorously buy cement, and in the future, we will also use cement in our projects, and I will also let the entire Chang'an, no... It is the entire Datang that is paved with cement roads.

So that our army can move quickly. ”

It is worthy of the emperor who came out of the war, and he saw the benefits of the cement road at a glance, and when the cement road is paved all over the Tang Dynasty one day, it will be very exciting.

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Pushing open the door of the five-story building, what shocked Li Shimin was that there were two pieces of yellow glass with a diameter of one meter in this gate.

You must know that the glass of the Tang Dynasty is still rare among the rare, Li Shimin does not have a few pieces in his hands, this Li Chengqian's gate is actually inlaid with a diameter of one meter, and the flat yellow glass, to be honest, Li Shimin can't be shocked if he wants to.

"It's... This... It's also too extravagant. Li Shimin looked at Li Chengqian and frowned slightly.

"Uh...!" Being drunk like this by his father, Li Chengqian looked at Li Zhan again and said, "It was my eldest brother who gave it to me...!" ”

"Zhan'er... I know you spoil your brother, but this... What a luxury...! Li Shimin also said a little bit to Li Zhan.

Here, Li Zhan said hehehe: "Your Majesty, what is this, it's just two very ordinary pieces of glass, go, go in and take a look... There's a lot of glass in there. ”

"And...?" Li Shimin was shocked.

Then, Li Shimin strode into Li Chengqian's five-story building, and what amazed Li Shimin was that this small building was really beautiful, with a large number of glass decorations inside, all of which were lifelike.

All of a sudden, Li Shimin and the eldest grandson Wuji couldn't move.

The eldest grandson Wuji said again and again: "Oops... Zhan'er, how did you get so much glass, oh my God, it's really beautiful, and there are at least a million of them here. ”

"Hmm... I feel like it's going to be at least three million. Li Shimin looked at a peach-shaped glass work and said with emotion.

Li Zhan laughed: "If Your Majesty and Lord Sikong like it, take some and take them away, these are not worth much to me." ”

Li Zhan's glazed works, in fact, are considered defective products, Li Zhan in Zhushan in addition to papermaking, mining, Li Zhan in Zhushan not only found a coal mine, but also found a quartz mine.

As we all know, this quartz stone mine is used to make glass, Li Zhan found some ways to make glass, and let the people over there in Zhushan try to make it, if the glass can be made, Li Zhan can not only make a lot of money, but also grow out-of-season vegetables.

However, the glass is not so easy to burn, so the glass is not burned, but a lot of glass is burned.

"Shall we take whatever...?" The eldest grandson Wuji looked at Li Zhan with some surprise.

Li Zhan smiled again and said, "Yes... You can take as much as you want, by the way, there are still upstairs, and better, I think Chengqian will put them upstairs. ”

"Let's go... Go up and have a look...! Li Zhan's words made Li Shimin laugh and say to the eldest grandson Wuji.

Follow a group of people upstairs, this five-story small building, Li Zhan repairs the kind of spiral staircase, looking at the first floor and the first floor, Li Shimin and the eldest grandson Wuji took a lot of good things in the building, and we Li Chengqian's flesh hurts.

But Li Chengqian never thought that when Li Shimin came to the top floor of the five-story building, the fifth-story building really opened Li Shimin's eyes.

There is only one room on the fifth floor, and this room is made of glass, walls, roof, and doors... Especially the door, it is a wrap-around door, one by one open, you can look at the sky outside 360 degrees, out of the room is a circular balcony, standing on the balcony, you can overlook the whole Dunhua Fang,

"It's really beautiful...!"

Even Li Shimin was shocked by this scene.

The eldest grandson Wuji stood beside Li Shimin and said: "I said why didn't the prince let me come up, it turns out that this place is really beautiful!" ”

"Huh...!" Li Shimin turned around and looked at Li Chengqian on the side with a smile and said, "Prince... This place will be my palace from now on, and you will go to another place. ”

"Ahh Li Chengqian was stunned.

Li Zhan laughed at this time: "His Royal Highness the Crown Prince is very happy." ”

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