As long as the cement thing is a modern person, there is nothing that you don't know, because this thing is completely used to build houses and build roads, bridges, anyway, when Lu Hanyang was repairing houses at home, he didn't use it less.

However, although this kind of thing has been used, but the specific formula or something, to be honest, Lu Hanyang only knows that it is burned with limestone mixed with clay. How many is the specific formula? Lu Hanyang and Li Er, like them, also have to experiment one by one.

Now Du Ruhui and Li Er are bringing such samples, from one to one, and then there are various proportions.

After a rough look, there were 20 samples, and the two materials increased or decreased to some extent, all of which increased and decreased in one percent.

Ninety percent limestone, one percent clay, or eighty percent limestone, and two percent clay, all of which are written on the burden of cement.

"Mix the cement, sand, and gravel together, then add water and stir! Who doesn't want too much, otherwise it will be thin, sand and gravel can be a little more, and the cement is not much, but the effect can also be seen! Lu Hanyang commanded the soldiers, and then began to experiment.

On the other side, a frame mold was nailed out of planks, and a whole plank was padded underneath so that it would not stick to the ground. Then the mixed cement slurry was directly shoveled in with a shovel and smoothed.

"Just put it first, and then sprinkle some water every morning and evening, and you can see the effect after three days, and you will stop at the kiln in the next few days to see which one is the best, and then fire." Lu Hanyang said to Li Er.

"That's it? What's the use of this? Li Er asked.

"I'll naturally see you in three days, and I don't want to talk about it now, but the name of your palace is really good!" To put it bluntly, Lu Hanyang actually still has vanity, even if he sees his heart clearly, he still feels very comfortable.

Li Er's sycophant is really a bit leaky, but it is very practical, anyway, it is just to change the name of a palace, and it is not taboo, even if those literati want to say it, then say it.

Although Li Er cares about reputation, compared with reputation, real interests make him more tempted. It's like he can kill his brother and prisoner his father for the throne, and now in order for Datang to get more benefits from Lu Hanyang, this emperor can directly pat himself on the back. But it was not flattery, which made Lu Hanyang feel that this kid was still good.

Three days passed in a blink of an eye, and in these three days, Li Er went back, but he left the soldiers of Qianniuwei to take care of the two dozen cement slurries wrapped in wooden frames in the courtyard.

On the third day, early in the morning, Li Er was ready to go to Yushan, but he had to go to the court. Because today is not only the day of acceptance of cement slabs, but also other things to deal with.

"Your Majesty, it has been verified that the method of treating malaria with Artemisia annua shown by Your Majesty is practical, and fifteen patients have been cured by Artemisia annua. Sun Daochang thinks that this is a good medicine, and it is simple, it only needs to dry Artemisia annua and then boil water, which can benefit countless southern people a lot, so I hope that I will promote it in the southern government of the Tang Dynasty! The eldest grandson Wuji reported.

"Sure enough?" Li Er is very happy, this thing can self-malaria, then the people in the south will definitely be able to live a healthier life. And this kind of thing is very simple for the government to implement, that is, a notice.

This move can be said to be beneficial to the country and the people, and the people in the south will be grateful for the kindness of the imperial court, and the imperial court will be able to govern in the south more smoothly.

"Your Majesty, the horseshoe has been verified, it is indeed a sharp weapon in the army, after a horse is on top of the horseshoe, it can directly gallop in the battlefield environment, and run back and forth from Chang'an to Luoyang, without reducing the damage to the horse's hooves!" Not only Artemisia annua has been effective, but also the horseshoe, which is an immediate thing.

The verification in the army is based on facts, running directly from Chang'an to Luoyang, and then running back, more than a thousand miles, so that there is no damage to the horse's hooves, then it is definitely a success.

"Haha...... Sure enough, God bless Datang! Li Er sat on the dragon chair and laughed happily, he was now very sure that the cement slab of the immortal would definitely surprise him.

For he told himself at the beginning about such things as horseshoes, but at the end he told himself about the cement as carefully as gunpowder, and made himself burn it anyway.

If Lu Hanyang knew Li Er's thoughts, he would ask: When did Lao Tzu tell you that it was going to be burned out anyway? Flatter yourself.

"Your Majesty, the thing that Your Majesty appointed the last general to make, there is already a sample, but how it needs to be used is up to Your Majesty to decide!" In the end, Duan Zhixuan also walked out of the court, as the commander of the Xuanjia Guard, Duan Zhixuan would not go to the court, but he came on this day.

"Haha...... You're even ready for that thing? I'll go to the Eight Views Palace later, and then ask the Pure Yang Immortal to come with me. Retreat now! Li Er was happy, and directly ignored what else the rest of the courtiers had to do, and directly announced his retreat from the court, and then got up and didn't go down, but walked out directly towards the front with a meteor.

"Your Majesty, where are you going?" As Wang Shang, who is the secretary of the Ministry of Rites, the patriarch of the Taiyuan Wang clan in the court, saw Li Er walking towards the outside of the hall at this time, bowed behind Li Er, and asked.

"Haha...... I'm going out of the city and going to Hakkeigu Palace! All of you Aiqing are willing to come together, all of them follow! "Li Er wants to see what the cement does this time, and it deserves the attention of the Pure Yang Immortal.

Li Er went out on patrol, and said that those who were willing to keep up would follow, and suddenly whether it was a military general, how could anyone who was unwilling? So it was another time that the Manchu Dynasty civil and military went to Yushan to worship the immortals, and the topic swept Chang'an City.

This is only a few short months, and Yushan has become the most respected place in the whole world except for the Taiji Palace in Chang'an City. It is not an exaggeration to even call it a holy place.

Of course, according to the respect that people have for ghosts and gods in this era, I am afraid that there are many people who think that the Eight Views Palace surpasses the Taiji Palace.

The emperor went out on patrol, and Qianniuwei sent thousands of men and horses around Chang'an City, and then Li Er converged a small Zhengtai's carriage at the gate of the city and came towards Yushan together.

In the Bajing Palace on the top of the Jade Mountain, at this time, Lu Hanyang was teaching Xiao Wu and Li Lizhi Taijiquan, and he could still play the twenty-four styles of Taiji, Li Li's body and bones were relatively weak, and this kind of activity could make her healthier.

The emperor's chariot went to the bottom of the mountain, and then went all the way up the mountain, more than two hours of road, at noon in the scorching sun, Li Er took the civil and military officials to the Bajing Palace, and then witnessed the birth of the first cement slab in the Tang Dynasty.