Deng Kui is Deng Zilong's personal soldier, and he often plays the role of a scout in battle, and he is also a scout. As a scout, in addition to understanding the enemy's troop deployment and reporting back to the commander, he also has a very important job, which is to draw a map of the war zone for the commander to arrange his troops.

At that time, the mapping technology was very backward, and many maps could not even guarantee the minimum proportional relationship, let alone use contour lines to express the undulations of the terrain. Deng Zilong's mentor was Luo Hongsheng, the champion of the Jiajing period, and Luo Hongsheng's most famous contribution in history was the compilation and drawing of the famous traditional map "Guangyu Tu".

When Luo Hongsheng compiled and painted the "Guangyu Map", he referred to Zhu Siben's method of "drawing squares in the plan" in the Yuan Dynasty, and also used standardized squares to represent the distance on the map, which is a relatively primitive concept of scale.

Deng Zilong's teaching of Luo Hongsheng popularized this method of drawing maps in his own army, so the maps used by his troops were much more accurate than those of other troops, and the scouts in the army also attached more importance to the role of maps than those of other troops.

However, the method of "planning and drawing" only solved the problem of labeling the horizontal distance, and the vertical drop could not be represented in the maps of that year. After Deng Kui himself returned from a reconnaissance trip, he could only draw some triangular symbols on the map to represent the mountains, and then simply mark the height. He himself knows that this kind of annotation method can only be regarded as better than nothing, and many times it can only be left to the main general to determine the situation on the battlefield based on impressions or guesses.

Now, Su Hao has used such a simple method to show the three-dimensional terrain on a flat map. When Deng Kui looked at this map at first glance, he had a vague feeling, but after Su Hao finished explaining, he fully understood this method of plotting, and quickly formed a three-dimensional picture in his mind.

"Master Su, you have such a clever mapping method, why didn't you explain it to my husband earlier?" Deng Kui asked Su Hao.

Su Hao scratched his head and said, "Where does this come from?" Your husband didn't ask me about this, did he? ”

"This is really a mistake, if my husband knows that Master Su has this method of mapping, I'm afraid that Master Su will also tie up Master Su to Yunnan." Deng Kui thumped his chest and paused.

"Uh...... Isn't this a little too barbaric? Su Hao said.

Hao Tong is a cautious entry, not as straightforward as Deng Kui. Hearing that Deng Kui was not like words, he hurriedly explained: "Master Su, Deng Kui is a rough man and is not good at words, Master Su should not worry about him." Master Su didn't know that our army was fighting on the border of Yunnan, and the terrain of Yunnan was quite complicated, with high mountains and deep waters, and no three miles of flat. Command was difficult due to the uncertainty of the terrain along the way. If the master can teach this mapping method, our army scouts can mark the mountains and rivers along the way in detail in advance, and our army will definitely be able to fight like a tiger. ”

Hao Tong is like this, Su Hao understands. The terrain in the southwest region is complex, and Su Hao knows it. To march and fight in such an area, a two-dimensional map is not enough. If you can't see the ups and downs of the terrain in advance from the map, then all battle plans are on paper and may not be realized at all in reality.

"Actually, it's useless for you to tie me up, right?" Su Hao smiled and said to Deng Kui, "I'm covered in iron, how many nails can I make?" Yunnan is so big, can you expect me to map the whole province by myself? ”

Deng Kui said: "Invite Master Su to go, naturally not to let Master Su personally go to the map, but to ask Master Su to explain this technique to the scouts of our army." Master Su's picture, although my old Deng understands it, if I want to draw it myself, I'm afraid I won't be able to draw it. Especially how high this mountain is, my old Deng can only make his eyes estimate, and I am afraid that it will be dozens of zhang out of here. ”

Su Hao said: "You also know that this surveying and mapping is not easy? If you want to learn surveying and mapping, you need to learn a lot of preparatory knowledge, and the scouts in your army are afraid that you will not be able to learn it. However, I do have an idea that we can open a surveying and mapping school in the mainland, train a group of surveying and mapping talents, and then send them to the border to draw maps. However, this matter is not something that my county master can consider, didn't your Mr. Tu stay in the military department, let him make a statement to the military department to promote this matter. ”

"That's a good idea." Hao Tong clapped his hands and said, "But my Mr. Tu has returned to Yunnan, and I want to get in touch with him. ”

"I couldn't have rushed this matter too much." Su Hao said, "If you really want to open a surveying and mapping school, it will take at least half a year to train talents." I think the two of you will help me figure out a way, a very thin pen, so that I can draw this kind of map. If you want to draw a 1:100,000 military map, the lines on it will be so dense that you can barely see it, think about it, what kind of pen can you draw it? ”

"This ......" Deng Kui and Hao Tong were embarrassed, and the excitement just now gradually subsided. They also know that without solving the problem of drawing tools, this kind of contour map is afraid that it is difficult to generalize.

"Master Su, the woman has a way, and I don't know if it's feasible." Han Qian, who had been meditating hard, suddenly lit up her eyes and said to Su Hao.

"Sister Han, please speak." Su Hao said.

Han Qian hesitated for a moment, and suddenly blushed and said, "This is just some whims of the woman, and I don't know if I can do it, or I won't come out first, so as not to insult Su Gongzi's respect." The woman dared to ask Su Gongzi to lend these pictures to the woman, and when I went back to try it first, when it was indeed feasible, the woman would explain it to Su Gongzi, what do you think? ”

"Uh......" Su Hao was speechless, this girl's family is really troublesome. I have my own way, but I refuse to come out in advance, for fear of being laughed at. Keeping these pictures at hand is useless for the time being, since Han Qian wants to borrow it, let her take it first, maybe she can really come up with a good way.

Han Qian saw that Su Hao nodded and agreed, and couldn't help but be overjoyed. She hurriedly called Yahuan Red Lotus and asked her to wrap Su Hao's pictures carefully and not to deface them.

In fact, Han Qian already had a good idea of how to make a fine map, and it would have been okay to come out. But seeing that Cheng Yi mastered the bookkeeping method so quickly, she expected that Su Hao would definitely let Cheng Yi do this work in the future, and she seemed to be good at nothing. Now that she can have a way to help Su Hao make drawings, of course she has to cover it first, wait for the finished product to be made, and then surprise Su Hao.

Han Qian and Cheng Yi each had something to gain, and when they saw that it was going to be too late, they left together. Su Hao and Lu Xiu'er sent the two of them out of the door, and Su Hao said to Cheng Yi: "Cheng family lady, I will teach you the bookkeeping method today, and I will trouble you to experience it carefully after you go back." My firm will open soon, there will be a lot of accounts to be recorded, and I also want to invite the Cheng family lady to come to serve as the general ledger office, what do you think? ”

"Master Su has an order, how dare a woman disobey? It's just that Cheng Yi is stupid, and I'm afraid I can't bear the position of the general ledger office. It's okay to simply keep some accounts. Cheng Yi said.

"Well, let's simply keep the accounts first, what position, later." Su Hao didn't want to talk back and forth with Cheng Yi about this kind of politeness, so he was generous.

After finishing Chengyi's matter, Su Hao turned to Han Qian again and said, "Sister Han, the matter of mapping is also a matter of importance. If Sister Han can really solve this problem, then she can definitely go down in history. ”

"How dare a woman have such an extravagant hope." Han Qian lowered her head and replied, but her heart was beautiful. She didn't know what was wrong with her, thinking that she could help Su Hao with a thousand things, and she had a pleasant feeling.

After sending the second daughter away, Su Hao returned to the hall and saw Deng Kui and Hao Tong still standing there, discussing the matter of drawing a map lively. Su Hao smiled and asked, "Two, now do you think that the flintlock pistol matter can also be put aside?" Maps are the most important thing? ”

Hao Tong hurriedly replied, "Why did Master Su say this? Maps are definitely a big deal, and so is a flintlock pistol. Our brother is here to chat, Master Su is only eight buckets high, there must be many skills that can be used in our army that our brothers have never heard of, right? ”

"No, no." Su Hao hurriedly waved his hand. The last time he missed a flintlock pistol, he provoked two door gods to squat at home to make progress. Jin Yao accidentally revealed a method of contour map, and asked Deng Kui to say cruel words about tying him up in the army. If I give them something more, maybe they're really going to do it.

"Master Su rest assured, our army has always been very respectful of talented people. If Master Su really has anything that can be beneficial to our army, my Mr. Tu has already ordered it, but he will not hesitate to ask for it. Hao Tong said.

"Don't hesitate to ...... a lot of money" Su Hao's eyes rolled, he is now short of money, the coal mine is about to open, and it takes a lot of money to drill wells in the early stage, and there is still a gap of several hundred taels of silver earned by promoting firewood stoves in the workshop. If you can borrow the 500 taels of silver promised by Tu Wenhuan from Hao Tong and Deng Kui, you can solve your urgent need.

"Two, I offered the method of flintlock pistol, and promised you that I would teach you the method of map mapping, can you first pay the promised 500 taels of silver to the students?" Su Hao asked with a smile.

Deng Kui shook his head and said, "Master Su, so far, the flintlock pistol you mentioned has not yet been made, and the map is just for us to see, so it is of little use to us. Can you come up with something useful, so that our brother will also have a reason to give you the money. ”

Count you ruthless! Su Hao said in his heart, he was thinking quickly in his mind about what kind of technology he could take out to bluff these two soldiers first, and after thinking about it for a while, it seemed that there was nothing military-related. Just as he was about to give up, his eyes suddenly lit up, and he couldn't help laughing:

"Since you two were scouts, have you ever seen a telescope?"