Xu Hui felt that it was not much use to reason with the little sister, and the key was still on Xu Qilin, so she only stroked the little sister's head and smiled silently.

At this time, various voices sounded in the side hall, as well as Xu Qilin's command and instructions.

"Open the stand first, yes, that's it. Then put the wooden box on it, in the order of the marked number. One and two above, three and four below. Hey, hey, lift slowly, don't break. ”

Princess Jinyang couldn't hold back her curiosity, beckoned Xiao Zhao, and the two ran over and peeked in through the crack in the door.

"I don't know what Qi Lin is doing?" Xu Hui was puzzled, guessed and said, "Bracket, wooden box? It seems to be something to eat, right? ”

His Majesty Li Er is also curious, but as the king of a country, he still has to be a little nervous, just smiling, but not guessing or commenting.

"Delicious, isn't it?" Princess Jinyang asked Xiao Zhao, as if she was about to drool.

Xiao Zhao shook his head and said, "If it's delicious, the second brother will eat it for me a long time ago, and I won't hide it." Besides, this is to be dedicated to His Majesty, and to be knighted. ”

Oh, Princess Jinyang was a little disappointed, but she felt that it wasn't food, and it would be good if it was fun!

Fortunately, the time was not long, Xu Qilin finished the arrangement, opened the door of the side hall, walked in, and saluted His Majesty Li Er: "Your Majesty, the model of the grass people has been placed, please take a look." ”

His Majesty Li Er nodded, with a reserved smile, got up and walked towards the side hall.

Xu Hui looked at the little brother couldn't help but show a smug look, pursed his lips and smiled, and patted his head lightly when he walked past Xu Qilin.

Hey?! It's a bit awkward to let your young lady touch her head!

Xu Qilin lowered his head and pretended to be docile in front of his sister, but his face was wrinkled, but no one saw his bitter appearance.

His Majesty Li Er walked into the side hall, raised his eyes to look at the objects placed in the room, and immediately widened his eyes, took a few hurried steps, looked carefully, and became short of breath.

Xu Hui followed behind, and seeing His Majesty behaving like this, he immediately knew that what the little brother had offered was extraordinary, and His Majesty would only do so when he was excited, excited, and shocked.

In front of everyone is a model of four large wooden boxes, which seem to be made of clay, with undulating mountains, rivers and woodcarved towns, and the names of places marked on them.

The green mountains, the white rivers, the blue oceans, the wood-colored cities, the earth-colored roads, the entire Tang Dynasty in a three-dimensional form, impacting everyone's sight and mind.

In ancient times, when there were no airplanes, remote sensing data, and artificial satellites, mapping seemed like a mystery.

In China, the earliest record of the origin of the map is the legend of Xia Yu's casting of the Nine Tripods, which were cast with images used to represent strange things in various places.

This kind of geographical drawing with mountains, water, and roads is not only convenient for fishing, hunting, and travel, but also considered to be the prototype of the cartograph.

In the "Zhou Li", there are maps of Kyushu, maps of the land of the world, maps of Zhaoyu, maps of gold, jade, tinnish, and so on. In addition, the concept of scale and abstract symbols has been developed, and the transition from model maps to flat maps has been made.

By the Spring and Autumn Period and the Warring States Period, maps became an indispensable tool for military activities. In terms of the representation of terrain and features, there has been some progress compared with before.

At that time, the need to build cities, build water conservancy, and dig canals and irrigation canals promoted the development of surveying technology and mathematical methods, and cartography began to be based on field measurements.

By the Qin and Han dynasties, maps had become more important and had begun to symbolize the territory and sovereignty of the country, and the rulers used it as a tool for rule.

At this time, the variety of maps gradually increased, and according to their contents, there were various special maps similar to administrative division maps, military formation maps, and extraterritorial geographical maps.

The first to systematically summarize the theory and style of ancient Chinese surveying and mapping maps, and put forward the "six bodies of cartography" that must be observed in cartography, was Pei Xiu of the Western Jin Dynasty.

Pei Xiu presided over the compilation of the "Yugong Geographical Map" and the "Topographic Abbot Map", which first used the method of planning and drawing squares, and made it a long-term principle and specification for the compilation of maps in ancient China.

In the Sui and Tang dynasties, although there were already many maps, such as the geographical maps of each county and the city, and so on. Moreover, great progress has been made in cartographic methods, but the shortcomings are still difficult to compensate.

After Pei Xiu, Jia Tan, an epoch-making figure in the history of Chinese geographical maps, inherited and developed the method of scientific cartography, and drew the famous "Hainai Huayi Map", which would not appear until the Tianbao period.

Even Jia Tan's map is flat, not as grand and accurate as Xu Qilin's.

Of course, Xu Qilin is not a fool. Although the memory after the crossing is amazing, the three-dimensional map that I have seen in my previous life can be restored as it is, but I don't dare to be too detailed.

First of all, for thousands of years, changes in topography, rivers and mountains are inevitable, and copying them as they are is simply not feasible.

Secondly, Xu Qilin has to have a reasonable reason to explain how to make this picture.

Therefore, on the basis of his memory, Xu Qilin still looked through a lot of old books, including those borrowed from the palace through his sister Xu Hui.

Moreover, Xu Qilin did not set the scale too finely. In this way, the details can be blurred. For example, the undulating mountains, the twists and turns of the rivers, and the remote areas need not be particularly accurate.

According to Xu Qilin's idea, the visual impact of the three-dimensional territory map is certain, I haven't seen it before! In the future, with the power of the emperor and the energy of the imperial court, it is enough to brainstorm and constantly improve.

In other words, Xu Qilin mainly provides an idea, a new way of making maps.

His Majesty Li Er looked intently at the three-dimensional territory map of the Tang Dynasty, as the Ninth Five-Year Honor, as the lord of this thousands of miles of rivers and mountains, there was a feeling of dominating the world and giving up on me.

"The majestic Tang Dynasty, the rivers and mountains are picturesque." His Majesty Li Er let out a long breath, slowly read the red letters on both sides of the model, gently bowed his head, and blurted out: "Good, good!" ”

It's novel, it's shocking, it's not seen before!

Xu Qilin grinned proudly, leaned over and restrained a little, be reserved, don't look carried away.

"Brother, I can't see it." Xiao Zhao stretched out his hand to pull Xu Qilin's sleeve, frowning.

My sister can't see it, so how can it work? Xu Qilin hurriedly squatted down and stretched out his hand over, ready to pick up his little sister.

Princess Jinyang stood on tiptoe, couldn't see clearly, and pouted, "I can't see it either!" ”

Yes?! Her Royal Highness the princess can't be lazy, and the two little girls can't favor one over the other.