There are no graceful postures, no glamorous singing and dancing, there are just more than a dozen or so civil and military men in armor or well-dressed, standing in front of a huge sand table made of sand and stones.

To say that Yan Shao has traveled to this era and brought about not many changes, but it is definitely not less.

At least on what he thought was reasonable and that did not adversely affect himself, he had always been hesitant to change.

For example, the sand table...

The sand table has actually been around since ancient times, but the sand table in this era is usually very rough.

It has been recorded in the "Book of the Later Han Dynasty and the Biography of Ma Yuan" written by Fan Ye of the Southern Song Dynasty of China: In the eighth year of Jianwu of the Han Dynasty (32 AD), when Emperor Guangwu conquered Tianshui and Wudu, the general Ma Yuan "gathered rice for the valley and pointed to the situation"

, so that Emperor Guangwu suddenly has "captured in my eyes"

This is the earliest sand table operation.

It wasn't until 1811 that von Leswitz, a civilian military adviser to King Freihelm III of Prussia, made an elaborate model of the battlefield out of clay, using colors to represent roads, rivers, villages and woods, and small porcelain blocks to represent troops and weapons, which were displayed in the Potsdam Palace for military games.

Later, Leswitz's son used sand tables and maps to represent the terrain and landforms, and used a chronograph to represent the deployment of troops and weapons, and planned strategically according to actual combat methods.

This "war game"

It is a modern sand table operation.

And the change brought by Yan Shao is the latter...

The ancient sand table is more time-consuming, and in comparison, it is not much stronger than the map, every place, and you also need to investigate the terrain to be, but the ancient dynasty for their own country, rarely draw and measure, the map is very simple kind, where will there be information to make the sand table?

So really start to move, really use the map, only in some areas that are very familiar or near some passes, there will be a more mature sand table, well, this maturity is still relative...

In comparison, Yan Shao will not be like this...

When he had just crossed over, Yan Shao had already begun to be confused about the map and sand table of this era.

To be reasonable, those very rudimentary maps seemed to him to be very troublesome.

It's just that at that time, others were soft-spoken, and the Yellow Turban Rebellion was about to come to an end at that time, so there was no need to run out and show off their thoughts.

It wasn't until later, after he became the Taishou of Beihai, that he began to paint and survey.

To put it simply, it is to send people to investigate and study the topography in Beihai and Qingzhou, and finally sort out a more detailed map.

At the same time, according to these materials, one small sand table after another was made, which is also the lesson of the Wuhuan Rebellion.

If there were enough sand tables at that time, so that Yan Shao had enough understanding of the entire Beihai and even the entire Qingzhou, then when dealing with the Wuhuan people, he could take a more active posture, even though Yan Shao had already done a good job at that time.

However, the real large-scale surveying and mapping work was carried out after Yan Shao became the Qingzhou pastor.

After becoming the pastor of Qingzhou, Yan Shao knew what his next task would be, and sent a large number of spies to the neighboring states, especially Jizhou, Yanzhou and Xuzhou.

These are also the three states that are most likely to have a conflict with Yan Shao.

There is actually no difference between a spy and a spy, in the thinking of ordinary people, the work of a spy is usually somewhat similar to 007, even if it is not, at least it is the kind of high-end atmosphere and grade, in fact, the work of a spy covers a really wide range.

Not only the high-end 007 series, but also other not-so-high-end jobs, including the aforementioned surveying and mapping.

As early as the Qing Dynasty, and even before the Opium War, there were already foreigners conducting secret surveying and mapping work in the treaty areas such as Guangzhou, and even more so during World War I and World War II.

In later generations, there was often news that illegal surveyors had been caught.

No way, there are indeed a lot of satellites these days, but many things still need people to walk with their feet and measure them...

With detailed data, it will be easier to grasp the initiative in future wars.

These spies sent by Yan Shao not only need to probe some information, but also need to carry out surveying and mapping work.

In the past few years that Yan Shao has been the pastor of Qingzhou, these spies have provided Yan Shao with a lot of information, and several rooms in Yan Shao's pastoral mansion are full of sand tables from neighboring states.

It was all drawn based on the information sent back by the spies, which also made Yan Shao more capable when fighting opponents

Uh-huh, I'm sorry, the latter must be made up as soon as possible!

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