It's just that Feng Yong felt that if the defeat of Old Pifu Wei was also counted in Zhuge Old Demon's calculations, he would be a little too suspicious of the character of the Prime Minister of the Han Dynasty.

However, if there was no defeat to paralyze Hao Zhao, the action of digging ditches and building fortifications at the back may not be carried out smoothly.

So......

Feng Yong glanced at Zhuge Liang secretly, a little entangled in his heart, which situation is the truth? Do I want to think of the prime minister of the Han Dynasty as brighter, or darker?

Feng Tu was still swaying, but he didn't expect Jiang Wei to be much more daring than he dared to think, "Cheng was already calculating the battle with Hao Zhao at the beginning?" ”

"The prime minister let Hao Zhao escape easily, in fact, it was also to make Hao Zhao believe that the Han had no way to catch up with him, so he stayed in the city so reassuringly."

When Feng Yong heard this, he couldn't help but raise his eyebrows and looked at Jiang Wei: Kuoyi, boy, smash, you dare to imagine it better than me.

According to this, maybe Zhuge Old Demon didn't take Guan Xing to Xiangwu as soon as possible, but put him in Linwei and already started to calculate? It's just right to hide your mobility.

When Zhuge Liang heard Jiang Wei's words, he smiled indifferently, "Soldiers are impermanent, water is impermanent, how can there be any secret and leakless schemes in this world?" ”

"Only by constantly revising and adjusting your strategy according to the actual situation in front of you, try to make arrangements for the enemy without noticing."

Feng Yong listened with pricked up his ears, but the prime minister of the Han Dynasty didn't say what he wanted to hear the most: You haven't said that those two battles are not in your design!

Seeing that Zhuge Liang stopped talking and didn't say any more, Feng Yongda was disappointed.

He thought for a moment and asked again, "Prime Minister, I see that although the water in this Weishui is constantly decreasing, it is estimated that it will take half a month to wait for it to stop flowing, what if it rains in this half a month?" ”

"This is exactly what I am worried about," Zhuge Liang looked up at the sky again, "Although it seems that according to the current situation, it is very likely that there will be a major drought, but if it really rains suddenly and the Weishui rises, I am afraid that it will give Hao Zhao a chance to escape." ”

As he spoke, he sighed again, "That's why I said, how can there be any secret and leaky schemes in this world?" It's just a matter of whether the chances are big or not. These days, I come to see this Weishui every day, just to estimate when I can intercept the flow above in advance. ”

"If you can intercept the flow a day earlier, you can have a chance for a day. As long as it is cut off for three or five days, the water in the wells that want to come to the city will begin to decrease. ”

"It's just that when to cut off Weishui, where to cut it, and how wide and deep the ditch to dig is also particular, which is also one of the geographical advantages, but it must be carefully estimated."

When Feng Yong heard this, he thought about it, walked to the water's edge and gestured, and turned around, "If the prime minister wants to know when to intercept the flow, I have a way." ”

As soon as these words came out, not only Zhuge Liang, but also Jiang Wei also cast his eyes on him.

"Prime Minister, instead of coming over every day and standing on the shore to estimate, it is better to go directly into the water and measure the water flow. Test today, test again tomorrow, and compare the two. ”

"First, we can calculate when the Weishui will stop flowing, and second, we can find low-lying land above according to the measured amount of water, and open a canal to drain the water in advance."

Hao Zhao in the city is not a fool, if he waits for the Weishui to dry up naturally, he will definitely make arrangements before the Weishui is cut off, so he must intercept the flow in advance.

"Water measurement?"

As soon as these words came out, not to mention Jiang Wei, even Zhuge Liang felt a little incredible, "This water is impermanent, who can calculate it?" ”

Feng Tu pointed at himself and said with a smile, "I'll count it!" ”

As long as the cross-sectional area of the river is calculated and its flow velocity is measured, its flow rate can be roughly calculated.

Fundamentals of Geography.

It's not a big river, just the amount of Weishui, if you want to calculate it, it's not simple?

It's not a hundred-year project, just roughly estimate it, and then inject some water...... Ahem, this one crossed out, get used to it.

Well, as long as there is an approximate result, that is, a five-day project, as long as there are enough manpower, you can dig a ditch and drain the water casually.

If time permits, Feng Yong can even calculate how big a depression is needed to accommodate the total amount of water for the five days.

But there is no need, as long as the drought continues, the water flow will only get smaller and smaller, as long as it is determined that there will be no return flow within five days, you can directly let the engineering team excavate, and there is no quality supervision, what are you afraid of?

In the face of great mathematical tools, this so-called geographical advantage is not a cause for concern at all.

This time, not only did Jiang Wei open his mouth wide and look at Feng Yong blankly, but even the prime minister of the Han Dynasty looked at him in horror and said in a lost voice, "You will do this too?" ”

"I understand a little."

Feng? High intellectuals? Yong shook his head and shook his head, triumphant.

How can you, the illiterate people of the feudal society, understand the power of my great Scientology?

In this case, if the amount of water can be calculated relatively accurately, the date of the cut-off can be accurately determined.

Even if it's a day in advance, it's an advantage of one day, and if it's one day short, God suddenly starts to rain, that's why you want to cry without tears.

"Forget this, isn't it troublesome?" The pragmatic Han Prime Minister didn't dwell on this too much, and couldn't wait to ask.

"It's not troublesome, as long as you find a gentle section of the river, you can calculate it in half a day."

"Good!" Zhuge Liang was overjoyed, "How many manpower appliances are needed?" ”

"No, I just need a few tents in the engineering team."

"Good, good!" Zhuge Liang's eyes burst with brilliance, he really didn't expect Feng Yong to have such ability, he was surprised and delighted, "This is the calculation of God and the measurement of impermanence!" ”

Just do it.

The section of the river that is easy to measure is easy to find, and the cross-section is easy to measure, but the flow rate is a bit troublesome because there is no stopwatch to keep time.

But it doesn't matter, there is no stopwatch, so according to the timekeeping method of this era, repeat the calculation many times with a colander, and then take the average.

Anyway, it's just the work of constantly sampling and double-counting in the river section that is convenient for measurement, and it's not a big deal.

Jiang Wei was still in the mood to see how Feng Yong calculated, but when he saw Feng Yong drawing something like a ghost text on his notebook, he was secretly frightened: I heard the prime minister say that this Feng Langjun went out of the mountain gate, and it seems that it is really true.

Just looking at this symbol that is different from the words of the world, either his teacher has existed since ancient times, and this is a long-lost secret text.

Either it is a script developed over several generations, specially used to record the knowledge of the master, for fear of revealing this ghostly knowledge.

I saw that Feng Yong was halfway through the calculation, stood up again, and shouted at the people in the river, "The next section of the river." ”

Then they threw away the notebook, and while they were measuring again, the cat leaned over and looked for something on the ground.

Jiang Wei walked over and asked softly, "What is General Feng looking for?" Can Wei help? ”

"Oh, it's nothing, it's just a wild vegetable like this, see? If General Jiang is free, you might as well help me find it and pull out a few more. ”

Feng Yong lowered his head and pulled the grass seriously.

Jiang Wei had the heart to get closer to Feng Yong, so he also went down at the moment, pulled the grass in his hand, and asked, "Isn't there anything special about this grass?" ”

"It's nothing special, it's just that it's too hot, and I want to eat some green vegetables, which can be eaten as a dish."

Feng Yong replied seriously.

Jiang Wei's hand paused, and he hesitated, "General Feng, this, aren't we measuring Weishui now?" ”

"That Wenshi should be able to memorize the process, let him list the data for me first, and then I will calculate the data later."

Seeing a fat noodle dish, his face was overjoyed, and he hurriedly dug it out carefully, and replied casually at the same time.

Jiang Wei listened, and his hands shook again, "This kind of knowledge, the general actually taught it lightly?" ”

Feng Yong sighed when he heard this, and said depressedly, "If only he could really learn!" ”

When it comes to learning ability, Amei is the most satisfying to Feng Yong, according to her learning progress before leaving Yueshan, she should have completed half of the high school content by herself.

But if she is asked to count this, it will be enough.