When Tian Yu, the captain of Huwuwan, was still in Youzhou, he was as powerful as the governor of Youzhou Wang Xiong.

Tian Yu advocated being tough on the Hu people, while Wang Xiong advocated being gentle on the Hu people.

In the end, Cao Rui chose Wang Xiong not only because of their identities and backgrounds:

Tian Yu was just a surrendered general, and he was from a humble background and had followed Liu Bei.

But Wang Xiong is different. He was promoted by Cao Pi himself and was born into a Shandong clan.

More importantly, Cao Rui's choice of Wang Xiong can not only relieve the pressure on the Youzhou border, but also mobilize more manpower and material resources to go west to resist Ji Han.

Even as the relationship with the Hu people eases, you can also get war horses through the grasslands.

But everything has advantages, there must be disadvantages.

The years of peace and frequent exchanges with the Hu people have not only caused the relaxation of the military equipment in Youzhou, but also the gradual abandonment of frontier warnings such as Shuzhai.

"The Baoqiu Water is actually a road connecting Youzhou and the outer city. The caravans in Youzhou often take this route and transport salt and iron to Yishi City in the outer city."

"After Tian Yu left Youzhou, there were also tribes outside the frontier who drove the livestock on this road and went to Youzhou to sell."

"But it is mostly in autumn, now it is summer, and the river water is high, so few people pass by."

The old Zhu Wu pointed at Baoqiu Shui and explained to General Zhendong:

"Sir, don't look at the waterside and you can only ride together. When the autumn water is low, the water is exposed to the bottom of the water. This place can even be used for the brigade of cavalry to walk."

"When the villain was young, Wuhuan was still strong, so he often went south to rob the Han area."

Speaking of this, he looked carefully at the General.

General Zhendong's face was calm, his eyes fell on the road beside Baoqiu Shui that could only ride together, and said slowly:

"It is enough to be able to ride together, but only if it cannot be discovered."

The old Zhu Wu hurriedly said:

"Now the livestock on the grassland is the time to gain weight, and there will be no tribes coming here at this time."

After hearing the old Zhu Wu's words, General Zhendong did not speak, but his eyes were looking to the south.

"When will the caravans in Youzhou usually go out of the frontier?"

"Sir, the Han caravans go out of the frontier, and most of them buy and sell livestock and fur with tribes on the grassland, and they are basically in autumn."

Then there is no problem.

He asked someone to call Pei Xiu up and ordered:

"From now on, you not only have to record the sections of the road we have walked, but also have to draw the shape of the mountain. Do you know?"

Pei Xiu nodded:

"Show understands."

As a disciple of King Feng, you may not know anything else, but you must know how to calculate and draw.

It is rumored that this is the first knowledge that Mr. Feng taught since he came out of the mountain, and it is the open-door learning.

Pei Xiu himself has a very high talent and has a strong interest in map drawing. He has to join Feng Guiwang's sect, which is like a fish in water.

In recent years, many people have participated in the mapping of maps in the Han army.

After a few more years of experience, I will enter the North Korea and officially participate in the map surveying and mapping of the Han Dynasty.

The map is a confidentiality of the court. The more precise the map, the higher the level of the secret.

Not to mention military maps, if ordinary people dare to hide them privately, it is at least a start to make a mistake.

Pei Xiu now doesn’t need to worry about her future.

The only question is where you can go.

Being able to follow General Zhendong to make contributions to the war will undoubtedly write a strong mark on his resume.

——

Although the water volume of Baoqiu surged in summer and the roads by the water can only accommodate double riders in parallel, for the big men who had just passed through the swamp and the poison valley, this was already a smooth road.

If you don’t have to worry about being discovered, you don’t even have to send a scout out, just follow Bao Qiushui all the way south.

Seven days later, General Zhendong led 7,000 elite soldiers to a large bay quietly. This was not only closest to the ancient mouth of Yuyang, but also the last big bay for the army to hide.

Less than twenty miles south is Yuyang Gu Pass.

As soon as the army appears at the entrance of the Wan, it will be immediately discovered by the guards of Yuyang Gu Pass.

Yuyang Ancient Pass is built on the west bank of the Baoqiu River. The terrain in front of the pass is small and can accommodate at most a thousand people to attack the city.

The east bank of the Baoqiu River is cut through the mountains and cannot pass through.

There is a mountain on both sides of the pass.

If Guancheng is an iron lock, then the two mountains of east and west are two iron gates.

The three are integrated into one, forming an extremely solid Youzhou key.

As long as there are three or five thousand defenders in Guancheng and one or two thousand troops stationed in the east and west mountains, even tens of thousands of troops will probably be difficult to advance.

Of course, Guancheng is not without weaknesses.

That is to wait until the water volume of Baoqiu drops in autumn and reveals enough riverbeds. If the defenders of Guancheng do not block the riverbed in time, they will take advantage of the cavalry's advantages and fight for heavy casualties to pass quickly on the riverbed.

Then turn around and attack from front and back. As long as Youzhou fails to rescue in time, it is enough to capture the pass.

But this weakness is equivalent to not being the case for General Zhendong.

Because she couldn't wait until that time.

And she can't withstand such casualties.

Putting down the Qianli Mile Mile Mile, General Zhendong looked at Pei Xiu, who was also holding the Qianli Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mile Mi

"how?

Pei Xiu estimated it in her heart and shook her head, "It's hard to say, I still need to go back and test it."

After gesture, he said, "Even if it can be done, the thief army may be able to move to the mountain in the west to hide..."

"You don't have to worry about the mountain, just pay attention to the checkpoint."

General Zhendong stared at Pei Xiu and said slowly:

"I urgently summon you to come here with the army just to solve the problem, not to ask you to ask questions."

"No matter what method you use, you must do this for me, otherwise you should know the consequences."

I don’t know if the weather was too hot or the pressure from General Zhendong was too great, Pei Xiu subconsciously let out a sweat:

"Students understand."

Then he raised the Qianli Mile Mile again and observed it carefully.

General Zhendong did not disturb him, but just looked at the mountain on the other side of Guancheng.

If you want to pass this pass successfully, in addition to winning the pass, you also need to take down the mountain on the west bank that depends on the pass.

As for the mountain on the east coast, it is not that important.

There is a Baoqiu Water separated by a river. If Guancheng is gone and the mountain on the west bank echoes, the military value of the mountain on the east bank will be greatly reduced.

There is a threat, but not a big threat.

After Pei Xiu finished observing, the few people quietly retreated down the mountain. The general of Zhendong along the way did not disturb Pei Xiu's thinking. He asked until he returned to the water bay where the army was stationed:

"What are your thoughts?"

Pei Xiu pondered for a moment and replied:

"It's not impossible. The outer city of the gate is about one meter away from the water surface. As long as the water level of the Baoqiu water can be raised by one meter, it will indeed spread to the city wall."

His eyes fell to the rushing Baoqiu Shui in front of him, and said thoughtfully:

"I have calculated the amount of water in Baoqiu these days. If you want to raise the water level by one meter, you only need to store water for two days, and it will not exceed three days at most."

"But there is a problem, that is, to find a water storage area of ​​at least one mile in radius. Of course, this is the minimum requirement, preferably one and a half miles or even two miles."

General Zhendong pointed to the water bay where the army was located and asked:

"How is it here? It looks big enough."

Pei Xiu shook her head:

“Big is big enough, but the location is not right.”

He pointed to the downstream water turn, "The exit is too big, it is difficult to build a dam, and the temporary dam is not solid. If it takes too long, there is a risk of collapse."

"If you build a dam there, the foot of the mountain will not be high enough, and you need to increase it."

While saying that, he shook his head, "The project volume is too large, we don't have enough manpower. If we really want to start construction here, it is very easy to be discovered by thieves. It's inappropriate, inappropriate!"

General Zhendong frowned. She chose this place to camp, one for the purpose of concealing, and the other for the convenience of water attacks.

This place is not far from the gate. If you can really store water successfully, it is easy to catch the thief off guard.
To be continued...