Empress Changsun sat beside Chengqian's bed and stayed overnight.

After lit the incense of peace, the imperial doctor You Chengqian stabbed the silver needle and released some blood, the prince finally fell asleep peacefully. Changsun never left his hands overnight, holding his son's hand and hummed a sleeping song for him gently.

It's dawn.

Li Chengqian woke up and his face turned a little better, but he was still very pale.

"Empress, Your Majesty brings Duke Zhao here."

Empress Changsun was unhappy when she heard the three words "Duke of Zhao" and her eyebrows stood up, "What else is Li San here to do?"

Li Shimin walked in from outside.

"Guanyin Maid, is Cheng Qian better?"

"My son pays homage to the father."

"Awaken? OK, I looked good last night. This little bastard scared me and your mother yesterday. But now I look pretty good."

Li Chengqian wants to get up, but Changsun doesn't let him go.

"My mother, when is it now? I haven't practiced in the morning today. I have to stab a hundred shots, draw a hundred bows, ride a horse for a while, and then go swimming."

Empress Changsun felt more and more distressed when she heard this.

"Your Majesty, Cheng Qian is still so young. It turns out that he did not practice like this when he was in the palace. Now when he goes to Bashang, Li Sanxun is like training a soldier. Where can the prince eat and eat!"

Li Shimin was very happy after hearing this. The prince took the initiative to do morning exercises, which is a good thing. At least, the prince's body is much stronger now.

"You need to practice more. How can you be strong without practicing your body? Only by practicing strong body can you avoid all diseases. It's great to stab a gun, pull a bow, ride a horse, and swim."

"Go and invite Duke Zhao in." Li Shimin said to the palace maid on the side.

Cheng Qian sat up from the bed, "Father, Queen Mother, is Li Xiang coming? I'll invite Li Xiang in." As he said that, he got out of bed, put on his shoes and was about to run out.

Empress Changsun hugged her, "You are not wearing your clothes yet, so be careful of catching a cold."

Li Shimin watched Chengqian go to greet Li Chao, and was a little surprised. Yesterday, this child was so frightened, but today he didn't hate Li Chao. This is really strange.

"Forget it, it's summer now, let him go, and he won't catch a cold."

Changsun let go of his hand, and Li Chengqian ran out.

Li Shimin followed his son's background and couldn't help but sigh, "Don't say that although Cheng Qian had not been in Bashang for a long time, his body was really strong. Look, his face was so pale yesterday, but after waking up after a sleep, he was already full of energy today. It's not so good to put it in the palace to raise it."

"But you didn't see what Cheng Qian looked like when he first came back yesterday, and I was so scared."

"Just get used to it." Li Shimin's attitude changed a lot after Li Chao's words yesterday.

"Children cannot be too pampered."

"Chengqian is the flesh that fell from my concubine."

Outside the hall.

Li Chao stood there with a food box.

The place he is standing now is Lizheng Hall, which is Li Shimin's bedroom. Because Changsun and Li Shimin have a very good relationship, they often live in this Lizheng Hall. Last night, Chengqian also lived here.

Lizheng Hall is equivalent to the Ganlu Hall in Tai Chi Palace, and it is also considered the former dynasty area of ​​the rear palace, but under normal circumstances, few ministers can come.

What's more, there is Empress Changsun in Lizheng Palace.

Looking at the palace, Li Chao found that it was pretty good.

The palace built during the Kaihuang period was very grand as the main hall of the Prince of the East Palace. However, for Li Chao, who was used to seeing skyscrapers, these palaces were nothing except for their design.

These palaces mainly cover a large area, but are not high. Compared with ordinary houses of this era, they are indeed very high, but if they were placed in later generations, the houses of ordinary rural farmers were so high. In later generations, rural farmers built their own houses, and there were more four or five floors.

Another feature of these palaces is that they use more luxurious materials.

Those pillars and beams that can be hugged by one person, even giant pillars that can be hugged by two or three people, and those whole large stone slabs are all very rare. Especially in this era, it is conceivable how much effort it took to transport these to Chang'an on the Great Plain.

However, when Li Chao builds Hanjing, there is no need to be such a problem, because he has an alternative solution.

For example, when cutting a mountain to get stones, the ordinary method is to chisel it directly, or even burn fire on the stone first and then water it. In short, it is very troublesome. But Li Chao can get some gunpowder. It may be very troublesome and complicated to use gunpowder as a weapon, but if it is just used to blow up stones, it is not as complicated as it is.

It will definitely be very useful if you shoot out the gun hole, then put in gunpowder and detonate it.

For example, after coke and a flat furnace can greatly increase the steelmaking speed. With enough steel, steel bars can be produced. With cement, it will be fine whether it is pile driving or top pouring.

Reinforced cement and bricks can also build columns.

In fact, these palaces are not tall, mostly with one or two-story structures. They are the same as the self-built houses of farmers in later countryside, and are not high-rise buildings with seven or eight floors or dozens of floors, so there is no need to consider too many technical issues.

A hydraulic sawing workshop can also be built by the river, and a hydraulic sawing machine can be used to saw wood. This may also be a good thing that can greatly save manpower. There are still many hydraulic machinery that can utilize water. If you no longer use those giant trees and rocks, then the construction project in Hanjing will be much smaller.

Li Chao didn't have to think about whether to log wood in Shu or get huge stones in Taihang. He just needed to find suitable minerals near Xinjing, then build a cellar to burn lime, cement, smel and roll steel bars, burn bricks and saw wood.

Pure brick structure and cement steel slabs do not require any advanced machinery, so there should be no problem in building a five or six-story building.

If some of these five or six-story buildings are built in the palace in Xinjing, it will probably be quite shocking.

He had sent people to explore minerals, and next he had to hurry up and sort out these production processes, build cellars, build production workshops, make these tools, and cultivate craftsmen.

A brand new production process is actually very troublesome.

But considering that if you go to Bashu to log wood, not to mention cutting, even transportation along the way will be quite difficult. Li Chao felt that he would have to work hard to get these new technologies out. At least, after the things are made out, he can still use them in the future.

In particular, Li Chao was not prepared to contribute his technology free of charge. He planned to set up these cement factories and teach his own family. At most, considering that the investment was large, he might attract more people to invest, or simply have a public offering, issue the most original stocks, and get more shareholder investments, and there will be no shortage of any amount of money to be paid at that time.
Chapter completed!