In the depths of the secret passage more than 20 meters long, there is the CIA's branch in Jinling, and the moment Xiao Xiulian twisted the password lock and opened the door, Zaichun was stunned by the lively scene in front of him.

The room is not big, only more than a hundred square meters, but there is a huge sand table in the middle of the Jiangnan region, and there are countless military maps on the surrounding walls, corresponding to the latitude and longitude on the sand table.

Zaichun has already received a basic mathematics education, in fact, in the imperial education system of the Forbidden City, there are courses in Western mathematics, and Kangxi himself was a master of geometry.

After Jae-chun arrived in the Ryukyus, Xiao Lotian specially made up a lot of mathematical knowledge for him, and he couldn't make it up if he didn't make it up, because ordinary people wouldn't be able to understand the military map if they didn't have a foundation in mathematics.

The biggest difference between military maps and civilian maps is that they are more detailed, while the other is that they have contour lines, and in the eyes of those who understand, a flat two-dimensional map can be imaged into a three-dimensional topographic map in the mind at a glance.

It can be said that looking at the military map is completely from the perspective of God, and the string of numbers outlines a detailed three-dimensional world.

The two armies were fighting, one side of the general used the two-dimensional map of the Qing Dynasty, and the other side used the advanced three-dimensional map, and the battle was already clear before it was fought.

The generals of the Qing Dynasty had to make preparations in advance, so that the tanma could find out where it was high and where it was low, where there was water and where there were forests and shrubs on the battlefield.

Generals with modern maps don't have to waste that time, because the spies have already mapped everything out of the map long before the battle begins.

Where to seize the high ground first, where to place the artillery positions, how to seize the upper hand and set fire to the water source if it is to be seized and poisoned, how to occupy the upper hand and set fire to it, has long been deduced countless times on this small map.

Xiao Letian knew that only the computers of later generations could replace military maps, because the computer system could truly simulate three-dimensional topographic maps, and with the help of satellite systems, those topographic maps were unimaginably detailed.

There is a telegraph machine against the wall around the intelligence center, and the carefully camouflaged wires are hidden in the walls of the houses, and they are connected to each other through dozens of secret interfaces and the main telegraph network, and dozens of telegrams are transmitted back and forth every day, and every move of the Jiangnan CIA is under the control of this brain.

Walking here, Xiao Letian has a feeling of entering the headquarters of the three armed services full of science fiction in later generations, he knows very well that the command system of the Ryukyus is not inferior to Europe, if compared with the backward Qing Dynasty, everything in front of him is actually a science fiction blockbuster.

Zaichun was childish and pounced on the edge of the Jiangnan sand table, first found that the direction was north, and then muttered in his mouth, "Up north, down south, left west, right east...... This side is the west, which is Shanghai...... This side is the east side, oh this is Wuhan ......"

Zaichun can understand the military map, and of course he can understand the military signs on the sand table, and all the troops of the Hunan army have been displayed on this sand table.

The names of the generals of the Hunan army, as well as a series of numbers, are written on small wooden cards and inserted in different positions on the sand table.

The telegram was passed back and forth, and the temporarily changed arming information was quickly reflected on the map, and those small wooden cards were either inserted in a different place, or the numbers were erased and written again.

Gradually, Zaichun's excited face became lonely, "Master, no wonder you don't want to train too many soldiers, with such a powerful intelligence network, if you give you an army of 40,000 or 50,000, you can completely defeat the Hunan army of 500,000 troops!"

"Don't talk about you, even I have found countless loopholes in the sand table, as long as the intelligence is in your hands, the army can see the seams on the battlefield, lead the enemy's nose, drag the elite soldiers into tired soldiers, harass the tired soldiers into weak soldiers, and finally annihilate the ......"

Xiao Lotian hugged Zaichun's shoulders and said, "Learn slowly, science and technology are not the strong ships and cannons you can see, steel and textiles...... Soft power in many places is terrible, for example, the popularization of the telegraph line is destined to change the whole pattern of warfare......"

"Mathematics, Physics, Chemistry...... All kinds of disciplines will exacerbate the changes in the world, and if a country wants to stand among the nations of the world, it depends on its comprehensive strength...... Let's go, let's go see the landlords of Jinling City, it's time to eat them!"

Walking through the command center, and bypassing two small secret passages, the group got out of a cabinet in a study, and Jae-chun realized that the secret passages had opened up many private houses, and many ordinary people hidden in a private house were the footholds of the CIA.

Turning around, he walked another cracked wall, pushed open the secret door and turned it into a storage room, which was full of rice noodles, and the beams were full of bacon and various baskets, Xiao Letian reached out and took out a pine egg from the jar at the foot of the wall, and handed it to Zaichun, "Taste it, I'm afraid there are few people in the palace who give you this ......"

This is actually the storage room of a restaurant, after Xiao Lotian and they walked out of the house, it was the backyard of the restaurant, the big shopkeeper and Xiao Er had been waiting here for a long time, and when they saw Xiao Lotian and Zai Chun, they kowtowed without saying a word.

The big shopkeeper's tearful and excited words were not good, "My lord...... Please ...... The third floor is all cleared, and the guests are waiting for you......."

The group of people went upstairs along the stairs, and in the end, only Xiao Letian, Zaichun and Hu Xueyan pushed the door at the door, and everyone else stayed outside.

In the warm private room, Zeng Guofan and Zeng Guoquan, who were brilliant at the top of the mountain, immediately got up and knelt on the ground as soon as they saw Emperor Tongzhi.

"Long live your majesty! Long live my emperor, long live, long live!"

"Flat, two Aiqing flat!" Zaichun hurriedly went to support the two, and after Zeng Guofan stood up, Xiao Letian just wanted to speak Zeng Dashuai and fired at him.

"Xiao Letian! You are taking Your Majesty on a study tour, which is a dignified and upright thing, why are you so hidden, can't the Son of Heaven come to Jiangnan? Why don't you play the honor guard of the Son of Heaven?"

"White Arowana suit, if there is any accident, my 500,000 Hunan army will definitely not let you go!"

Looking at the angry Zeng Guofan, Xiao Letian shrugged his shoulders, "Okay, okay, Zeng Dashuai, you first dissipate your anger, you know better than me what is going on in the court now, if Your Majesty comes to Jiangnan with great fanfare, is it really good? Those people in Beijing City will agree...... Don't be angry at me yet, I haven't seen Your Majesty for a long time, and you still don't catch up with the past!"

"Hmph! I'll settle accounts with you later......" These five figures of the Great Qing Dynasty who could tremble across the country by stomping their feet finally sat together and had a dinner that affected modern Chinese history.

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