It is precisely because the reliability of the flying machine has not been too satisfactory to the Tang Dynasty, so at this time, the Tang Dynasty is responsible for the way to transmit important news, mainly the railway system, which is much faster than the previous transmission of news on horseback, and in places where there is no railway, then you can only continue to use horses to transmit news.

The speed and sustainability of the train are higher than that of horses, so since the post station system of the Tang Dynasty court has the help of the railway, the efficiency has been greatly improved, the efficiency of conveying important news of the imperial court has increased many times, and the hard work of the post station personnel has also been greatly reduced, all remembering Li An's goodness.

But since ancient times, all important information is not changed by horses, that is to say, the person who delivers the letter must keep hurrying, keep changing horses, and can not delay for a minute or a second, so that the speed is not much slower than the train, that is to say, after the use of the train, the speed of sending the letter has increased several times, and according to the different circumstances, the increase is also different.

This increased speed is a great improvement for the post station system of the entire Tang Dynasty, and the court is very satisfied, even the emperor is very happy, and this is still too little for Li An, and it can't satisfy Li An at all.

And when Li An raised this question, Li Longji's first thought was the big guy of the plane, after all, he had already seen this behemoth, but the reliability was not very good, and he had fallen to his death, so the emperor always had some lingering palpitations in his heart.

Li An knew that the emperor would react like this, the corners of his mouth smiled slightly, and he said: "Your Majesty guessed wrong, even if the flying machine flies fast, it will take a long time to reach Luoyang, it is too slow, it is too slow, it must be faster." ”

"Oh, Aiqing can make something faster."

The emperor is really very interested, if he can really create something that greatly increases the speed of communication, then the administrative efficiency of the Tang Empire can be greatly improved, and officials from all over the country will no longer be able to go to Chang'an City in person to report their ruling situation, and what important things happen in various places can also be known to the imperial court as quickly as possible.

Li An saw a cup of tea on the table next to him, and said: "Your Majesty, what Weichen wants to invent, it only takes a cup of tea to spread His Majesty's will to Luoyang City, of course, if possible, there are even more powerful ones, it only takes a blink of an eye to reach Luoyang City." ”

"What, a cup of tea, a blink of an eye, I only need to blink an eye, the people of Luoyang City can know my will, this is also amazing, Aiqing can really create such a magical thing."

Although Li Longji is the king of a country, he still seems a little out of shape when he hears such shocking words, if he didn't know Li An, he would probably have pulled Li An out and killed him as a madman.

Many good things invented before have made the emperor full of trust in Li An, he believes that Li An will never say nonsense, since Li An said this, it must be true, for so many years, Li An really has not let him down, every time he praises Haikou, Li An has completed the task very magically.

It is precisely because of many previous examples that although Li Longji couldn't believe what Li An said, he had to believe it, and once such an artifact was really invented, it was impossible for him not to know what it meant for the Tang Empire, which could simply increase the administrative efficiency of the Tang Empire by hundreds of times, which was simply terrifying and scary.

Seeing the emperor like this, Li An smiled and said respectfully: "How dare Weichen deceive Your Majesty, in order to improve the administrative efficiency of my Tang Dynasty and facilitate Your Majesty's rule of the Quartet, even if there are great difficulties, Weichen will do his best to develop such an artifact." ”

Now that this idea has been spoken, Ang Lee will do whatever it takes to develop this magical equipment.

And the artifact that Li Ang said is just the telegraph and telephone of later generations, these two things are not worth mentioning for later generations, and once they are made to the era of the Tang Dynasty, it is enough to shock everyone.

"Okay, if Aiqing can develop such a powerful machine, it will be very important for Datang, how long will Aiqing be able to develop it."

Li Longji asked with great concern.

Li An thought for a moment and replied: "Your Majesty, it is not easy to develop such a machine, and it still needs to be continuously improved, and in a year and a half, there should be results, in short, Weichen will definitely do his best." ”

"Okay, great, Aiqing is really the pillar of my Tang Dynasty, by the way, what does such a machine look like, how big is it, and is there a sketch!"

Li Longji wanted to take a look, so he asked.

Li An didn't bring a sketch, and said: "Your Majesty, what such a machine will look like, Weichen himself can't be very sure, but as long as it is finally completed, it shouldn't be very big, about the same as this food box!" ”

After speaking, he pointed to the food box next to him, which Yang Yuhuan had just delivered, and it contained Li Longji's favorite snacks.

"It's just that big, it can't be the shape of a bird!"

Li Longji opened his mouth to guess.

Li An smiled and said: "Your Majesty said that it was funny, even if the birds fly fast, it is impossible to send the news to Luoyang City in the blink of an eye, and the machine that Weichen wants to invent does not need to move in the slightest, only a few gentle knocks, and Luoyang City will know." ”

As he spoke, Li An boldly walked to the position of the food box, put his finger on the lid of the food box, and gently tapped it a few times.

Li Longji didn't blame, and said happily: "If it can really be invented, it would be great, Aiqing will do it all with all her might, if you need anything, just tell me, by the way, there are some pastries here, which are made by the concubine herself, take them back and taste them!" ”

"The concubine is for Your Majesty, how dare Weichen."

Li An felt that something was wrong, and opened his mouth to refuse.

"It's okay, the concubine also takes a fancy to you, if you know that these snacks are for you to eat, you will definitely be very happy, just accept it!"

Since Li Longji sent it sincerely, Ang Lee had no choice but to accept it.

Subsequently, many generals and officials who followed Li An to the south all entered the main hall, and the emperor also announced the rewards given to them on the spot.

A few days before the return, the newspapers and periodicals in Chang'an City reported the advanced deeds of Li An and his officials on the front page, until Li An returned, this kind of report still did not stop, it was simply a hegemony.

And the nobles and officials in the capital were all very concerned about Ang Lee's return, and on the day Ang Lee returned to the capital, a large group of people went to Ang Lee's residence to give gifts, and they almost broke the threshold of Ang Lee's courtyard.

For these gift-givers, Ang Lee's principle is only one, that is, to accept all the orders, because other nobles do this, and Ang Lee is not exempt from vulgarity, in case he makes himself too high, it will bring him great trouble.

Of course, you don't need to do it yourself, the subordinates of Ang Lee's mansion can complete this task, and Ang Lee himself only needs to occasionally look at the account book to see who gave what gift and how valuable the gift is.

The person who gives the gift is a friend, and the person who does not give the gift is also a friend, Ang Lee will not deliberately target him because some poor officials do not give gifts, and he does not have this leisure.

To say that Ang Lee's main task is to engage in scientific research, he doesn't ask about the affairs of officialdom, and he doesn't have the power of other officials, but Ang Lee is too powerful, too close to the emperor, and is the most special figure in the entire Tang Dynasty, so although Ang Lee does not have the power to kill these officials, they dare not offend Ang Lee, let alone give gifts.

Officials and aristocrats will give gifts to Li An according to their status and wealth, some people give gifts that are very valuable, and some people give gifts that are not very valuable, and Li An must have already explained to the servants, and according to the different gifts, they should give a certain amount of gifts in return, and these gift-givers should not be too lost.

Naturally, the return gift cannot be the same as the gift-giving items, they are all things that are very worthless to Ang Lee, but very important to outsiders, such as mirrors, which are very cheap, but the prices on the market are very high, and Ang Lee regards mirrors as gifts in return.

If you give less gifts, you will give a very ordinary small mirror, and if you give more and drink better, then give a larger, high-end mirror with a frame of golden silk nanmu to reflect the status of the giver is different.

Of course, if you meet someone with a particularly high status, Ang Lee will also specially customize a return gift for them, that is, a unique return gift.

For example, Yang Guozhong, King Qi, King Zhao, Yang Yurou and so on, they also sent housekeepers to Ang Lee's mansion to give gifts, and the gifts were all valuable items, including antiques, calligraphy and paintings, as well as very large antlers, thousand-year-old ginseng, fist-sized gems, in short, all kinds of gifts, and what Ang Lee could give them was nothing more than mirrors or all kinds of interesting glass balls.

These things are very cheap, but it is really difficult to buy on the market, if it is customized, it is even more valuable, for example, the glass ball inlaid with items in the middle, which can not only be inlaid with animals and objects, but also can be inlaid with words and patterns on paper, and even three-dimensional Chinese characters can be inlaid in the glass ball, so it must be very beautiful.

Different people have different preferences, so for different big people, Ang Lee's return gift is different, for example, the return gift to Yang Guozhong is a palm-sized glass ball, which is inlaid with a running horse carved in white jade, and the horse is also inlaid with four big characters carved by topaz to success, the horse and Chinese characters are clearly visible, but you can't touch it, which is very meaningful.

And the gift to Yang Yurou and other women, it can not be horses and eagles and other objects that represent the sun, but should choose small objects such as peony flowers and plants, of course, it must also be carved in jade, with topaz can be carved flowers, and green jade can be carved leaves, and then with black jade carved euphemisms, and even carved two butterflies above the flowers, so, it is perfect.

The larger the glass ball, the more objects inside, the more difficult it is to make, and of course, the more cherished the crafts after the production is complete, and the higher the cost.

However, even if the cost is higher, for Ang Lee, it is far less valuable than the gifts given to him by these local tyrants, and glass is a very worthless thing in Ang Lee's eyes.

Those who give gifts to Ang Lee, Ang Lee wants to give gifts in return, and some people even if they don't give gifts, Ang Lee also wants to give gifts, for example, especially important people, such as emperors and kings.

For glass balls inlaid with various items, Li Ang has studied very maturely, and the crafts manufactured are becoming more and more exquisite and complex, but in order to maintain their rarity, the glass balls sold on the market are generally rarely inlaid with complex items, and it is good to be able to put a small insect, and the size of an egg is already very large.

However, such a small glass ball must not be able to carry complex objects, so many exquisite and complex glass balls must be at least as large as the mouth of a bowl, so as to accommodate enough inlays to reflect the value of this luxury.

Since the invention of this large glass ball, Ang Lee has made no more than a hundred glass balls that exceed the size of a bowl, each of which is a fine product, and the more complex and beautiful it is made in the future.

Of course, the initial technique was Ang Lee's, but the later production became more and more complicated, which is the credit of the craftsmen, who under the careful guidance of Ang Lee, explored little by little, so that they could make larger and more complex glass balls, which surprised Ang Lee.

In the back garden of Daming Palace, the Yang sisters who have nothing to do sit together and chat casually, this is their daily life, and the palace is about to become the private garden of their Yang sisters, and they can come whenever they want.

"Sister! My sister recently got an interesting baby, and I'm bringing it to you today. ”

Yang Yurou took out a small square box made of rosewood, and then carefully opened it, and inside was a beautiful glass ball.

Glass balls are not unusual, but they are so large and have such a complex and sophisticated internal structure, but they are treasures that cannot be seen on the market.

"A white peony, but quite chic, the green leaves set off is also very good, there is a bee collecting honey on it, this bee is not made of jade, it is a real bee, and there is a poem, Guan Guan Ju Dove, in the river island, my fair lady, the gentleman is good, all carved with the jade of the first number."

Yang Yuhuan held the glass ball in his hand, his eyes were full of excitement and admiration, and he was full of praise.