Xu Hui felt that it was useless to reason with her younger sister. The key was still on Xu Qilin, so she only stroked her younger sister's head and smiled without saying a word.

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

"Open the bracket first, yes, that's it. Then put the wooden box on it and follow the marked number order. The top is one and two, and the bottom is three and four. Alas, lift it slowly and don't break it."

Princess Jinyang couldn't help but curiosity and greeted Xiao Zhao. The two ran over and peeked through the crack in the door.

"I wonder what Qi Lin is doing?" Xu Hui was puzzled and said with a guess: "Stack, wooden box? It seems to be what food is served, right?"

His Majesty Li Er was also curious, but as the king of a country, he still had to be a little nervous, just stroked his beard and smiled, without guessing or commenting.

"Is it delicious?" Princess Jinyang asked Xiao Zhao, as if she was about to drool.

Xiao Zhao shook his head and said, "If it was delicious, my second brother would have given me a meal long ago and would not hide it. Besides, this is to be dedicated to His Majesty and to win an official title."

Oh, Princess Jinyang was a little disappointed, but she thought it was not food. It would be nice if it was fun!

Fortunately, the time was not long, so Xu Qilin finished the arrangement, opened the door of the side hall, walked in, and bowed to His Majesty Li Er, "Your Majesty, the model of the grass people has been placed, please read it."

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

Xu Hui looked at the proud look that her younger brother couldn't help but show her smugly, and gently patted his head as she walked past Xu Qilin.

Huh?! It’s really awkward to let you touch your head!

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

His Majesty Li Er walked into the side hall, raised his eyes to the objects placed in the room, immediately widened his eyes, walked a few steps, looked carefully, and breathed rapidly.

Xu Hui followed behind. Seeing Your Majesty performing like this, he immediately knew that the things I offered were extraordinary. Only when you are excited, excited, and shocked will Your Majesty be like this.

Shown in front of everyone was a model made of four large wooden boxes. The model seemed to be made of glue soil. There were undulating mountains and rivers on it, and there were wood-carved small towns, with place names marked on it.

Green mountains, white rivers, blue oceans, wooden cities, earthy roads, the entire Tang Dynasty's thousands of miles of rivers and mountains impacted everyone's sight and mind in a three-dimensional form.

In ancient times without planes, remote sensing data and artificial satellites, drawing maps seemed a mysterious thing.

In China, the earliest record of the origin of maps is the legend of Xia Yu casting the Nine Cauldrons, and images are cast on the cauldrons to represent strange things in various places.

This kind of geographical drawing with mountains, water and roads is not only a convenient way to fish, hunting and travel, but is also considered the prototype of maps.

In "The Book of Zhou", it records the map of Jiuzhou, the map of the land in the world, the map of the domain, the map of gold, jade, and stone, etc. Moreover, the concepts of scale and abstract symbols have been established, and the transition from the model map to the plane map has been made.

During the Spring and Autumn Period and the Warring States Period, maps became an indispensable tool for military activities. In terms of terrain and representation of land objects, there have been some progress compared to previous methods.

At that time, the need to build cities, build water conservancy, dig canals, etc. promoted the development of measurement technology and mathematical methods, and map drawing began to be based on on-site measurement.

By the Qin and Han dynasties, maps were taken more seriously and had begun to symbolize the country's territory and sovereignty, and rulers used it as a tool for rule.

At this time, the variety of maps gradually increased. According to their content, there are already various special maps such as administrative division maps, military formation maps, and extraterritorial geographical maps.

The earliest systematic summary of the theory and format of ancient Chinese surveying and mapping maps, and proposed the "six-body" that must be followed in mapping, which was Pei Xiu of the Western Jin Dynasty.

The "Yugong Regional Map" and "Topographic Abbot Map" compiled by Pei Xiu first used the method of drawing squares in Jili, and made it a principle and norm for the compilation of maps in ancient China for a long time.

By the Sui and Tang Dynasties, although there were already many maps, such as regional maps, city maps, etc., the mapping methods have been made great progress, but the shortcomings are still difficult to make up for.

Another figure who followed Pei Xiu, Jia Dan, an epoch-making figure in the history of Chinese geographical maps, inherited and developed scientific mapping methods. The famous "Magazine of Chinese and Japanese in China" was not available until the Tianbao period.

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

Of course, Xu Qilin is not a fool either. Although his memory after traveling through time is amazing, the three-dimensional maps I saw in my previous life can recover as they are, but I dare not be too detailed.

First of all, for thousands of years, changes in terrain, landforms, rivers, mountains and rivers have been inevitable, and copying as it is simply not feasible.

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

Therefore, based on memory, Xu Qilin still looked through many old pictures, including borrowed from the palace through his sister Xu Hui.

Moreover, Xu Qilin did not set the scale too fine. In this way, the details can be blurred. For example, the mountains are undulating, the rivers are twisted, and the areas in the distance do not need to be particularly accurate.

According to Xu Qilin's idea, the visual impact of the three-dimensional territory map is certain, and I have never seen it before! From now on, relying on the power of the emperor and the energy of the court, we will focus our ideas and continuously improve it.

In other words, what Xu Qilin provides is mainly an idea and a new method of making maps.

His Majesty Li Er looked at the three-dimensional territory map of the Tang Dynasty. As the Lord of the Nine Five and the Lord of the Ten Thousand Miles of China, he felt that he was the only one who could dominate the world.

"The vast Tang Dynasty has a painting of the country." His Majesty Li Er let out a long breath, slowly recited the red regular script on both sides of the model, gently said, "Okay, okay!"

Novelty, shocking, never seen it before!

Xu Qilin grinned proudly, leaned over and restrained himself a little, and had to be more reserved, so as not to be complacent.

"Brother, I can't see it." Xiao Zhao reached out to pull Xu Qilin's sleeve and frowned.

My sister can’t see it, so how can it work? Xu Qilin hurriedly squatted, reached out and prepared to pick up the younger sister.

Princess Jinyang tiptoed and couldn't see clearly. She pouted and said, "I can't see either!"
Chapter completed!