"Xianggong~! Has something happened again in the past few days? The concubine has been sad when she sees you several times~! ”

It's night.

The West Courtyard of the Lee Mansion.

Han Yuxi asked softly behind his back while helping Li Zexuan untie his clothes.

"Well, it's kind of something~! Do you remember the assassin in the east of Chang'an City a few days ago~? ”

Li Zexuan nodded and said.

Husband and wife are one, and besides, the Seven Cultivation Sect is not a very powerful force in Li Zexuan's eyes, so he feels that there is no need to hide it from his daughter-in-law.

Han Yuxi's hand holding the clothes shook violently, and she saw that her brows were furrowed, and her voice suddenly became cold, and she replied:

"Of course I remember~! That person hurt the father-in-law, if the concubine is capable, she will definitely be broken into ten thousand pieces~! ”

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

"Hehe~! These things are just done by men~! Lady, you eat and drink well, rest well~! ”

Han Yuxi said angrily: "Eat well, drink well, rest well, wouldn't that be a pig~?" ”

"Haha~! What happened to the pigs~? Pigs are still the second smartest little animals in the world~! ”

"Go~! Don't be poor, get down to business~! What did you mean by mentioning that assassin~? Didn't you meet him again in the past few days~? ”

Han Yu glanced at Li Zexuan, and then asked seriously.

"Hmm~! That's not true~! ”

Li Zexuan pulled Han Yuxi to lie on the bed together, and then continued: "Yesterday, I happened to hear the origin of the assassin from Wang Renbiao's house, it is said that it is from the Seven Cultivation Sect of Snake Spirit Mountain, and then I went to Jingzhao Mansion to ask Huafu Yin to help me inquire about the specific location of Snake Spirit Mountain~!" Presumably, there should be results in a few days~! ”

"Snake Spirit Mountain~?"

Han Yuxi muttered again, but after all, he still felt that he had never heard of it, so he continued: "I hope that Jingzhao Mansion can bring this assassin to justice, otherwise the concubine's heart will always be unstable~!" ”

Although Li Zexuan knew in his heart that this matter would not be solved so easily, he still said with relief: "Yes, it will~!" I can definitely catch the assassin's ~ this time! Lady~, let's rest in peace soon~! ”

"Hmm~!"

.................................

"Hmm~? This cement is really interesting~! ”

In the temple of manna, candles are still lit in the middle of the night.

Li Er played with a palm-sized cement block on the dragon case, and smiled meaningfully.

Sitting next to him was the Empress Eldest Sun.

The couple didn't sleep in the Lizheng Hall in the middle of the night, but they went to the Ganlu Hall to work, and they didn't know what they thought.

"Your Majesty, is this what Qingque got back today~?"

Empress Eldest Sun asked curiously.

"Hehe~! Precisely~! It is said that this is a new material developed by Li Zexuan to replace glutinous rice mortar in the Qiqu Pavilion Workshop, and now it seems that the effect is surprisingly good~! ”

Li Er sighed, and then handed a large piece of cement in his hand to Empress Changsun.

In other words, I don't know where Li Tai brought this goods back from a broken cement pavement at the construction site, and it is estimated that a certain craftsman will scold his mother again tomorrow!

"Wow~! It's so sturdy~! Your Majesty, is this big piece all poured out of cement~? ”

Empress Changsun took it and pinched it with her hand, was taken aback, and hurriedly asked.

"Well, really? The shaping ability of this cement is better than glutinous rice mortar! Li Zexuan: This is another new thing that is more practical and cheaper for my Datang! ”

Li Er sighed with a smile on his face.

"Huh~? Why did Your Majesty know that this cement is cheaper than glutinous rice mortar~? ”

Empress Eldest Sun asked curiously.

"Heh~! Needless to say~? You can guess it, if the cost of this thing is higher than that of glutinous rice mortar, how could Li Zexuan go to great lengths to study him~? I estimate that the ingredients in this cement should be some sand and lime, and it does not contain any expensive raw materials! ”

If Li Zexuan was here, he would definitely brush a wave of "6666666" for Li Er, Lao Li's preliminary guess was simply hanging to the point that he had no friends!

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

Empress Eldest Sun 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, and the "Yuanhe County Atlas" recorded that "the Sui camp capital, Yu Wenkai took the north and south of Zhuque Street with six high slopes, as the image of the Qiangua, so the palace was placed in ninety-two, in order to be the residence of the emperor, and the ninety-three hundred divisions were established in order to respond to the number of gentlemen, and the ninety-five nobles did not want ordinary people to live in it, so they placed the Xuandu Temple and Xingshan Temple to the town. That is, with reference to the theory of Zhou Yi Xiang Number, and the overall layout design of the capital city is carried out by comparing the six lines of Qianfu.

In the first year of Wude, when the Tang Dynasty was first established, Li Yuan ordered Yan Lide to rebuild the outer Guo City of Chang'an City.

In the Tang Dynasty, the mileage of the large journey was 360 steps for one mile, and the small journey was 300 steps for one mile; The large size is 12 inches, the small size is 10 inches, and the total length of the outer Guo city wall of Chang'an City has reached about 36 kilometers at that time, which is undoubtedly a magnificent project that is unparalleled in the world at that time, of course, the money consumed is also an astronomical amount.

Therefore, Empress Eldest Sun will feel a little regretful after seeing the cement.

Since last year's "Weishui Alliance", Li Er has been worried about money, and Empress Changsun will naturally be particularly sensitive and concerned about saving money.

"Hehe~! The matter has come to this point, it is useless to say more~! What's more, what's the use of a strong outer wall~? My Datang military talent is the most solid city wall of my Datang~! If the descendants of future generations are not angry, and are approached by foreign soldiers under the city, they can only shrink within the city walls, then I think it is better to lose the country~! The Tang Dynasty of my province must surrender to the four provinces, and all nations are afraid~! No one will be able to come to Chang'an City anymore~! ”

Speaking of the city wall, Li Er suddenly remembered that last year, Jieli and Tuli Erhan, led 200,000 Turkic soldiers to line up in Weishui and come to the city of Chang'an. That time, if Jieli was a little braver, regardless of the reckless assault on Chang'an City, even if the walls of Chang'an City were as high as majestic, I am afraid that they would not be able to withstand the attack of these 200,000 male soldiers, which made Li Er have a new view of the city wall, it is better to defend than to attack!

This is the difference between Li Er and the kings of later generations! If Li Zexuan had traveled to the Song Dynasty or the middle and late Ming Dynasty, if he had made cement again, there was a 90% probability that the monarch at that time would use cement to strengthen the city wall and defend against foreign enemies. They are "improving their armor" to ensure survival, and what Li Er pursues is completely attacking instead of defending, and when all enemies are frightened, naturally there is no need for the city wall to defend against foreign enemies!

…………………………………

(End of chapter)