Otaku Engineer in Great Tang Dynasty Chapter 489: City walls, offense and defense~!

"My husband~! Did something happen again in the past few days? My concubine was frowning when I saw you several times~!"

It's night.

Li Mansion West Courtyard.

Han Yuxi helped Li Zexuan undress and asked quietly behind her back.

"Well, it's something~! Lady remember the assassin in the east of Chang'an a few days ago~?"

Li Zexuan nodded and said.

The husband and wife are one, and the Seven Cultivation Sect is not a very powerful force in Li Zexuan's eyes, so he felt that there was no need to hide his wife.

Han Yuxi shook her clothes hand suddenly, and saw her frowning, her voice suddenly became cold, and she replied:

"Of course I remember~! That person was injured by the mate. If the concubine is capable, he will be broken into pieces~!"

Li Zexuan smiled, turned around to take Han Yuxi into his arms, and said:

"Hehe~! All these fights and kills are done by men~! Lady, you can eat, drink, and rest~!"

Han Yuxi angrily said, "Eat, drink, and rest. Isn't that a pig~?"

"Haha~! What happened to the pig~? The pig is still the second smartest animal in the world~!"

"Go~! Xianggong, don't be poor, and talk about business~! What did you mean by that assassin~? Could it be that you met him again these few days~?"

Han Yuxi gave Li Zexuan a glance, and then asked seriously.

"Um~! That's not true~!"

Li Zexuan took Han Yuxi and lay half down on the bed, and then continued: "Yesterday I accidentally heard the origin of the assassin from Wang Renbiao's house. It is said that he was from the Seventh Sect of Snake Lingshan. Then I went to Jingzhao Mansion. W.F. Yin helped me find the specific location of Snake Ling Mountain~! I think there should be results in a few days~!"

"Snake Spirit Mountain~?"

Han Yuxi murmured, after all, she felt that she had never heard of it before, and then continued: "I hope Jing Zhaofu can bring this assassin to justice, otherwise the concubine's heart will always be unstable~!" /

Although Li Zexuan knew that this matter would not be solved so easily, he still said with relief: "I will, I will~! This time I will definitely catch the assassin~! Lady~, let’s rest early. Come on!"

"Um~!"

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"Huh~? This cement is really interesting~!"

In the Temple of Ganlu, the candlelight was still on late at night.

Li Erba played with a palm-sized cement block on the Dragon Case, and smiled deeply.

Next to him sits Empress Changsun.

The couple didn't sleep in Lizheng Hall most of the night, but ran to Ganlu Hall to work. They didn't know what they thought.

"Your Majesty, is this the blue bird brought back today~?"

Queen Changsun asked curiously.

"Haha~! Exactly~! It is said that this is a new material specially developed by Li Zexuan for Qiquge Workshop to replace glutinous rice mortar. Now it seems that the effect is surprisingly good~!"

Li Erhehe sighed and then handed a large piece of cement in his hand to the grandson queen.

By the way, I don’t know where Li Tai brought this product from a piece of concrete pavement that was broken at the construction site. It is estimated that a certain craftsman will scold his mother again tomorrow!

"Wow~! It's so strong~! Your Majesty, is this big piece made of cement~?"

Queen Changsun took it and squeezed it with her hand. She was surprised and hurriedly asked.

"Well, it is true! The shaping ability of this cement is better than that of glutinous rice mortar! Li Zexuan has brought me a more practical and cheaper new thing!"

Li Eryi sighed.

"Huh~? Why did your majesty know that this cement is cheaper than glutinous rice mortar~?"

Queen Changsun asked curiously.

"Heh~! It's still necessary to say~? You can guess it. If the cost of this thing is higher than that of glutinous rice mortar, how can Li Zexuan bother to study it~? I guess the ingredients in this cement should be some Sand and lime are nothing but expensive raw materials!"

If Li Zexuan were here, he would definitely give Li Er a wave of "6666666". Lao Li's initial guess was so hungry that he had no friends!

"Hmm~! So, if this cement appeared ten years earlier, wouldn't the wall of Chang'an City save a lot of money? Besides, if the wall is built with cement, it should be stronger?" /

Queen Changsun said regretfully.

The predecessor of Chang'an, the capital of the Tang Dynasty, was the Daxing City built by Yu Wenkai in the early Sui Dynasty. The "Pictures of Yuanhe Prefectures and Counties" recorded: "The capital of the Sui family, Yuwenkai has six high slopes in the north and south of Zhuque Street. The image of the Qian hexagram, so the palace was set with ninety-two, the residence of the emperor, nine-three set up a hundred divisions, to respond to the number of gentlemen, ninety-five nobles, do not want ordinary people to live, so set Xuandu Temple and Xingshan Temple Take the town as the town." It means to design the overall layout of the capital city with reference to the Zhouyi Xiangshu theory and the six lines of Qianfu.

In the first year of Wude, at the beginning of the Tang Dynasty, Li Yuan ordered Yan Lide to rebuild the outer city of Chang'an.

The mileage in the Tang Dynasty was 360 steps per mile for long distances and 300 steps per mile for small distances; 12 inches for large feet ~ IndoMTL.com ~ 10 inches for small feet. At that time, Chang'an City used large distances and large feet. After calculation, the total length of the outer city wall has reached about 36 kilometers. This was undoubtedly a magnificent project unparalleled in the world in that era. Of course, the money consumed was also an astronomical figure.

So, Empress Changsun will feel a little regret after seeing the cement.

Since last year's "Wei Shui Alliance", Li Er has been worrying about money. The Queen's grandson will naturally be particularly sensitive and caring about saving money.

"Haha~! This is the end of the matter, it is useless to say more~! What's more, even if the strong wall meets a real strong enemy, it will be useless! My Datang's military personnel are the most solid wall of the Tang ~! If the descendants of future generations do not live up to their ambitions and are surrounded by foreign soldiers and can only be shrunk within the city walls, then I think it would be better to subjugate the country~! My great Tang, the four barbarians must surrender and the nations will be afraid~! The soldiers are coming to Chang'an City~!"

Speaking of the city wall, Li Er suddenly remembered that last year, the Jieli and Tuli Khan, led two hundred thousand Turkic soldiers, lined up the Weishui, and came under Chang'an City. That time, if Jie Li was brave and attacked Chang'an City regardless of recklessness, even if the wall of Chang'an City was so majestic, it might not be able to withstand the attack of these two hundred thousand soldiers. This would give Li Er a new kind of city wall. From the view, defending is worse than attacking!

This is the difference between Li Er and the later kings! If Li Zexuan traveled through the Song Dynasty or the middle and late Ming Dynasty, if cement was produced, there was a 90% probability that the monarch at that time would use cement to reinforce the city wall and defend against foreign enemies. They are "upgrading armor" to ensure survival, and what Li Er pursues is to use offense instead of defense. When all enemies are frightened, they naturally don't need walls to resist foreign enemies!

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