The design idea of the Luoshui Bridge is absolutely extremely advanced, this is the design idea of the cross-river bridge in later generations, which is more than a thousand years more advanced than the era of the Tang Dynasty, and it is normal to be recognized by Li Longji, there is nothing strange about it. Pen? Interesting? Pavilion wWw. ｂiquge。 ｉｎfo

Of course, the Luoshui Bridge designed by Ang Lee is a low-profile version, and there is no comparison with the cross-river bridges of later generations, but it is similar in shape and ideas, and the scale and materials are far behind.

But with the realistic conditions of Datang, as long as it can build the appearance of the cross-river bridge in later generations, it is already very powerful, and it cannot be too demanding, after all, the material resources and materials are limited, and only a low-profile version can be built, just like the train built before, it is also a low-profile version, and the high-speed rail and Shinkansen of later generations cannot be compared.

Of course, even if it is all a low-end version, it is already an absolute high-end for people in this era of the Tang Dynasty, at least Li Longji, as the emperor, already thinks that the Luoshui Bridge is an extremely high-end bridge.

"Your Majesty, this is nothing, in the future, Weichen will definitely be able to design more ingenious bridges, especially the bridges on the Yangtze River and the Yellow River, and we must build the most magnificent and sturdy ones."

Li An was praised a few words, and suddenly became stunned.

"Haha! All right! Li Shilang has to work hard, by the way, what suggestions does Li Shilang have for the formation of the bridge department? ”

Li Longji asked.

Li An thought for a moment and said: "Your Majesty, the main responsibility of the bridge department is divided into two parts, one is to organize a large number of craftsmen to build large bridges, and the other is to maintain and maintain the built bridges, and at the same time charge a certain toll fee to make up for the loss of financial resources when building the bridge. ”

"Tolls? How will I be charged? ”

As soon as Li Longji heard that the bridge was going to charge a fee, he immediately became interested, and Guo Xuji's eyes also lit up, this is people's instinctive reaction to money, which is normal.

"Your Majesty, barricades can be set up on both sides of the bridge, and all carriages, horses and pedestrians who want to cross the bridge must pay tolls before they can cross the bridge, among them, pedestrians and horses pay less, and carriages carrying goods must charge some more, but the cost cannot exceed the price of the ship at the wharf, otherwise, the bridge will be repaired in vain, and as for the passage of trains, there is no charge, so as not to interfere with the normal movement of the train."

Ang Lee gave his own advice.

"Okay, Li Shilang's suggestion is very good, the bridge toll can gradually recover the cost of building the bridge, greatly relieving the pressure of building the bridge in the future, and the price is cheaper than the ship, which can be regarded as reducing the burden on pedestrians, so do it."

Li Longji was overjoyed, in this way, the large bridge has become a gold-absorbing artifact held by the imperial court, and the toll of the bridge will become a very important source of income for the Tang Dynasty in the future, and together with the railway system, it will contribute a steady stream of financial resources to the Tang Dynasty to support the continuous operation of the Tang Dynasty.

Subsequently, Li An handed over the drawings of the canal bridge to Li Longji, and pointed out that the scale of the canal bridge is larger than that of the Luoshui Bridge, and the amount of work is about five times that of the Luoshui Bridge, and more manpower is needed to complete it as soon as possible.

Of course, Li Longji was extremely supportive of Li An, and immediately promised that how much coolie labor was needed to build the bridge, and the people's labor would be drawn directly from the vicinity of the bridge-building site, and the court officials at all levels should fully cooperate with the officials of the bridge department, otherwise, the construction period of the bridge would be delayed, and the punishment would be severe.

After leaving the palace, Guo Xuji thanked Li Ang very gratefully, and begged Li Ang to help him with the work of the bridge department so that he could make achievements.

Of course, Ang Lee will not refuse, and made it clear that it is his responsibility to build every bridge, and he will definitely do his best to help the bridge department, so that the bridge department can grow up as soon as possible, and gradually get rid of his dependence on himself.

After showing his token, Li An smoothly went out of the city from the south gate and went straight to the other courtyard, at this time, it was already very late, because no one was notified in advance, so everyone in the other courtyard did not know that they would return at this time.

"Ah Lang, why are you back, the slave will go and inform Madame."

Li Xiaoyin was in charge of the night, and when he saw Li An suddenly enter the main house, he stood up in surprise, ready to inform Yan Ruyu.

"No need, by the way, it's so late, Madame hasn't rested yet?"

Li An asked suspiciously, it was already late at this time, Yan Ruyu should have fallen asleep.

"The slave and maid don't know, the lady has been reading in the house tonight, just now the slave and the maid went to light the lamp, and saw that the light in the lady's house was on?"

Li Xiaoyin whispered.

"It's so late, why don't you sleep, do you have a premonition that I'm going to come back."

Li An smiled slightly and strode towards the courtyard of the main house.

Sure enough, Yan Ruyu hadn't fallen asleep yet, through the window of the tempered medicine jade, you could clearly see Yan Ruyu's beautiful face, at this moment, Yan Ruyu was sitting upright reading a book, not realizing that Li An had returned.

Li An was not in a hurry to return to the bedroom, just in the courtyard, quietly through the window, admiring Yan Ruyu who was reading seriously, the more he admired, the more he felt intoxicated, why was his wife so beautiful?

"Ah Lang, you just came back, the slave maid asked the kitchen to prepare some snacks!"

Li Xiaoyin walked to Li An's side lightly and whispered.

"No need, I'm not hungry, you can rest! I'll go in with Madame in a moment. ”

"Yes, Aaron."

Li Xiaoyin responded and slowly retreated.

Li An admired it for a full moment, until he couldn't hold it anymore, then he strode to the bedroom, and suddenly appeared behind Yan Ruyu, reaching out to cover Yan Ruyu's eyes.

"Who, who."

Yan Ruyu was covered by Li An's eyes, and was immediately shocked, but seeing that the person behind him did not make further movements, he eased his mind and guessed: "Cao'er, is it you?" ”

Li An held back a smile, took an intimate bite in Yan Ruyu's ear, and bit Yan Ruyu's ear and held it in his mouth.

"Husband, it's husband, why did you come back suddenly."

Yan Ruyu is very familiar with Ang Lee's strange preference, except for Ang Lee, no one has ever behaved like this to him, and the sucking sensation feels like only Ang Lee can do.

"It's not fun, it's not fun at all, you guessed it so quickly."

Li An let go of his hands, bent down and rested his chin on Yan Ruyu's shoulder.

"Husband, it's really you, why did you come back suddenly, and it's still a big night."

Yan Ruyu frowned.

"My husband was originally going to build a bridge in Luoshui, but I missed my wife too much, so I secretly ran back, and my wife didn't sleep in the middle of the night, did I miss my husband too much, and I couldn't sleep lonely?"

Ang Lee said jokingly.

"As soon as my husband comes back, he is not serious, I really hate it."

Yan Ruyu glanced at Li An, but her expression clearly revealed excitement and ambiguity, the handsome and handsome husband went home, how could she not be excited?

"It's been holding back for half a month, how can you get up seriously for your husband, come on! Let the husband be pampered. ”

Li An smiled evilly and hugged Yan Ruyu in his arms.

Yan Ruyu smiled, the corners of her mouth and eyes were full of intoxicating charm, and her two jade arms tightly wrapped around Li An's neck, posing as if she was being favored by Li An.

"Madam, have you missed me for the past half month?"

Li An asked domineeringly as he walked to the bed.

"Husband, people really miss you."

Yan Ruyu's cheeks were crimson, and her eyes looked at Ang Li even more charming, as if she had been ready to be pampered by Ang Lee, and waited for Ang Lee to go home.

Ang Lee can't stand this kind of charming look the most, and this kind of look also appears on a beautiful woman like Yan Ruyu, which makes it even more difficult for Ang Lee to control.

"Madam, you are really beautiful tonight, really beautiful."

Li An said and put Yan Ruyu flat on the bed, put his hands on Yan Ruyu's shoulders, rubbed his clothes and slowly moved outward, and took off Yan Ruyu's clothes very easily.

Next is the more rude popping movement, Li An has been holding back for more than half a month, and he is angry? Of course, I don't care about any pity and cherishing the jade, I will satisfy myself first, besides, Yan Ruyu's expression was extremely intoxicated, and she did not show that she was hurt, which further made Li An more unscrupulous and rude.

After late autumn, the weather is getting colder and colder, but this can not stop the enthusiasm of the craftsmen in the R&D center to work hard, the production of various machinery has not been affected in the slightest, and with the use of more and more advanced steam machine tools, the construction speed of machinery is also continuing to grow, which greatly accelerated the industrialization process of the Tang Empire.

Ang Lee's enthusiasm for continuing to develop more advanced products has not diminished in the slightest, and according to his own memory, he provides craftsmen with ideas for improvement and research and development, and even draws drawings for craftsmen to follow.

Since the establishment of the R&D center, Li An himself can't figure out how many products have been developed, if all the large and small products are added together, it is estimated that there are hundreds of thousands, of course, there are only a few large-scale advanced machinery, most of them are not very advanced ordinary products, and there are many products that are developed for export and sold to western countries, so as to obtain sufficient financial resources to further revitalize the industrial economy.

For example, products such as glass balls with small animals and small mirrors of medicinal jade are very suitable for export, which can bring rich financial resources to the Tang Empire and Li An.

Under the premise of more and more abundant financial resources, all kinds of scientific research undertakings have made great progress, and various new products and improved materials have been born.

What particularly excites Ang Lee is that steelmaking technology has made great progress, after the advent of concrete materials, blast furnaces can be made bigger and stronger, and the steelmaking technology has been improved step by step, so that the hardness and toughness of steel have been greatly improved.

The improvement in the performance of steel means that more advanced machinery can be built, less steel can be used to build more reliable parts, especially in the field of cannon casting, the thickness of the barrel can be greatly reduced, thereby reducing the weight of the entire gun and facilitating rapid mobile deployment.

In addition, the performance of steel and the use of metal cutting machine tools allowed Ang Lee to try to develop more advanced breech guns, so as to improve the practicality of artillery to a great level.

The structure of the breech gun is not complicated, Li An also wanted to build a breech gun for a long time, but the performance of the material and processing machine tool is too backward, and it is impossible to process it at all, and now, the technology of steelmaking technology and processing machine tools are developing rapidly, which makes Li An see that the time is ripe for the construction of breech guns, in order to better play the power of the gun and deter potential enemies, the development of breech guns has been put on the agenda.

All the technical personnel involved in the development of breech guns are all talents who have developed artillery in the past, and Li An has great trust in these technical personnel and believes that they will certainly be able to complete the task of developing breech guns.

Ang Lee drew all the parts of each part of the breech gun, and asked these technical personnel to develop the gun according to the drawings and continue to test until they made a usable breech gun.

Thinking that the breech gun was about to be developed, Li An was very excited, this time, the breech gun developed by Li An is much better than the artillery that has been equipped with the troops, and there are a number of technical improvements

First, the use of a stronger steel treatment process reduces the thickness of the barrel of the gun, thus making the gun lighter.

Second, the breech gun structure of the body tube, the gun tail and the gun valve is adopted, which is very convenient for loading shells and cleaning the gun barrel, which can greatly improve the firing speed of the gun.

Thirdly, an ignition firing pin was added to the tail of the gun, so that there was no need to adopt the backward method of torch firing, so as to further improve the efficiency of artillery firing.

Of course, the technology of breech guns is not the end, and Li An will continue to develop more advanced artillery, so as to make the artillery technology of the Tang Empire make another big leap.

The R&D personnel of the breech gun are being developed step by step in strict accordance with Ang Lee's requirements, and any materials and equipment needed can be obtained at the first time.

Ang Lee, on the other hand, gathered some blacksmith talents and began to develop iron wires, which would be in great demand in the future, and used various types of iron wires to manufacture spring materials of different thicknesses.

Whether it is iron wire or spring, it has extremely important practical value, and it is of great significance to the manufacture and research and development of various machinery in the future.

The manufacturing process of iron wire is really not complicated at all, that is, the iron block is burned to a softened state, and then the softened iron block is put into the mold cavity, and the mold cavity has a small opening, and the softened iron block is squeezed from the back, and the iron wire can be obtained from the small mouth.

In order to preserve these freshly made wires, a cylinder with a relatively large diameter is also needed to roll up these freshly made wires.

The mold for manufacturing iron wire must be scald-resistant, if it melts when it hits the hot iron, it will definitely not work, in addition, the strength must also be guaranteed, otherwise, it will be broken from the back force, and it will not be done.

The best material for high temperature resistance is undoubtedly ceramic, and the material with high strength is steel, so the idea proposed by Ang Lee is to make a mold with the inner tank as ceramic and the outer wall as steel, so as to squeeze the softened iron block and create the required iron wire, and the large cylinder used to roll the iron wire can be made of ceramic material.

Datang is a big country in ceramics, and it is a piece of cake to manufacture various types of ceramics, so it is not difficult to develop equipment for manufacturing iron wire, as long as you spend a little effort on research and development.