Jin Jun raised the fire and cooked the rice porridge thoroughly, and then used a damp cloth to clamp the copper pipe blocked under the pot with fire tongs, and the flame was extinguished.

"It seems that Jin Jun has already felt the knock on the door, and he knows to put an end to oxygen." Bai Liyan said secretly in her heart.

But it is obviously impossible for the Jin army to know that oxygen is a combustible gas, thinking that the local people have been producing and working all year round, and this phenomenon was discovered, and after the Jin army occupied Duyang, it was known to the Jin army.

But since Han He whimsically wants to blow up the Xian Army, unless there is natural gas underground where the Xian Army is located, and it can't harm Duyang City, this means that there is no natural gas underground in Duyang City, so he Han He can eat so accurately? Since he was going to blow up the Xian army, why did Han He go to great lengths to dig that big pit by the river.

The big pit was obviously used for irrigation, otherwise it would not have been dug by the river, perhaps Han He didn't know what the "explosion" was, but had another use.

Thinking of this, Bai Liyan (Wei Xian) slowly retreated, returned to Zhao Guang and Weng, and asked:

"You can know that there is no need for firewood or carbon stone here, and you can make fire directly from the ground."

"How is this possible?"

Zhao Guang was taken aback, and the urn also denied:

"I've never heard of it."

Both of them said that they had not heard of the phenomenon that the ground could be directly fired, which couldn't help but make Bai Liyan think, I'm afraid that the Xianjun didn't know this situation either.

Most of the Xian troops crossed the river from the Xian country itself, and there were almost no locals. Thinking of this, Bailiyan decided to go to the big pit over there after dark to see what was going on inside the pit.

It is obviously unrealistic to ignite natural gas, and Han He should not know about the phenomenon of "explosion", and it is impossible for him to know about igniting a natural gas explosion, so it can only be for other purposes.

Perhaps because they were far away from the front line, the local Jin army was very little guarded, lying on the outskirts of the forest, and there were hardly a few sentries in sight, so that the three of Bailiyan slowly crawled around the woods, and the two thousand Jin troops failed to find the abnormality. At the same time, a large number of horseshoe prints on the ground also confirmed that the cavalry of the Jin army had indeed come here.

At dusk, the Jin army is still repairing, there are only a few Jin army handles near the big pit in the southeast river section, and Bailiyan is more than 400 meters away from the edge of the pit.

It is no wonder that Han He wanted to mobilize the cavalry, because it required a lot of manpower to dig the earthwork in turns, and then transport it out, and the more than 200 mud-soaked carts parked around were obviously used to load the earthwork, and then transported it to a farther place to dump.

The sky was getting dark, there was a rapid vibration on the ground, and when I looked up at the northwest, I could faintly see that the cavalry of the Jin army had arrived again. His heart suddenly tightened, and he had to speed up his movements, otherwise as soon as the Jin cavalry arrived, he would not be able to go back today.

With the help of the cover of dusk, Bailiyan accelerated his crawling speed, and climbed to the edge of the pit with great effort, bypassing the sentry who was chatting, and looked down, stunned and surprised.

Under the pit is actually a big downward hole, there are torches erected in the hole, people can be heard faintly, there is a wooden staircase spiraling down on the edge of the pit, and there are traces of vehicles on the stairs, which means that the stall carriage that disappeared from the Jin army must have been used in the excavation project here, and the stairs have been at the bottom of the hole to facilitate the personnel to go up and down.

The depth of the vertical cave is 30 meters, the height of a ten-story building, and the upper part of the vertical cave, that is, this part of the surface excavation, is excavated manually, and the lower part is a natural karst cave. This means that there should be an entrance before the surface is excavated, and after the Jin army found that there is a cave below, they decided to use it.

"Could it be that this cave is all the way to the east?!"

Bai Liyan himself was taken aback, if this natural karst cave was all the way to the east, it could not be ruled out that it would lead to the location of the Xianjun's current camp, but how did Han He know, unless this was a double-headed cave, and there was an exit to the south.

Otherwise, with the current technical means, how can we know that we will definitely pass near the Xianjun camp.

Han He transferred 30,000 cavalry, probably in order to speed up the excavation operation inside the cave and widen the space of the cave so that it would be easier to march.

Such a huge underground cave system is not uncommon in karst landforms, and the deepest underground cave on the earth is thousands of kilometers long, not to mention walking, even aircraft carriers are enough. It cannot be ruled out that the current cave is a cave where pedestrians can walk. Han He mobilized cavalry to dig at night, probably just to widen the cave.

At this time, Bailiyan wanted to go down to find out, but it was too late, the cavalry of the Jin army rushed to the woods one after another, and said something to the Jin army in the forest, all 30,000 cavalry dismounted, and more than 5,000 of them were rushing to the entrance of the cave, it seemed that they were working in turns to avoid being too tired.

At the same time, more than 25,000 people remained on the ground, which could not only cope with emergencies at any time, but also take turns to repair.

"Han He deserves to be a general, he is so thoughtful, it seems that he is in trouble this time."

Sighing secretly in her heart, Bai Liyan accelerated and crawled towards Zhao Guang and Weng.

"Your Excellency, what's going on in the pit!" Zhao Guang asked anxiously.

"The situation is not good, hurry up and leave first, this matter needs to be reported to General Zhao urgently."

"That's good!"

The three of them quickly evacuated, and when they left the entrance of the cave for two miles, the three of them stood up and accelerated their departure, returning to the Xianjun camp, which was already an ugly moment in the early morning.

Bailiyan did not return during the day, which made Zhao Xun uneasy, worried about whether something was wrong, and kept walking back and forth in the tent, at this time, the soldiers outside the tent suddenly came to report:

"General Zhao, Wei Xian, Zhao Guang, and Weng have returned to the camp."

When Zhao Xun heard the news, his face suddenly disappeared:

"Quick, bring it to the tent."

"No!"

Not long after the pro-soldiers withdrew, the three of Bailiyan entered the account:

"I've seen General Zhao!"

Bailiyan and the three of them raised their hands to give a slight salute, and Zhao Xun hurriedly asked:

"Your Excellency, why did you return to camp until now?"

"Back to General Zhao, Zhao Guang and Weng and I visited the camp of the Jin army yesterday night, because we found that the 30,000 cavalry of the Jin army were not in the camp, so we went to the east of Duyang."

"East of Duyang, the Jin army is doing something there." Zhao Xun was puzzled, and a trace of sadness appeared on his forehead.

Bai Liyan explained in detail the various conditions of last night's camp and the karst cave found by the river today:

"General Zhao, I'm afraid that this hole is directly near our army's camp, or at the foot of our army, if the Jin army steals the camp, or diverts the river water to irrigate our camp, our army's camp will inevitably collapse overnight."

"You mean, the Jin army wants to attack with water!"

"It's not impossible. If there is a cave in the ground of our army, and the river water is poured into the hole, the water will definitely hit the soil in the cave, and it may not be effective for a day, but if it is a few days or ten days, I am afraid that it will be difficult for our army to find out. At that time, the sky will fall, and although our army will not be completely annihilated, I am afraid that it will also be wiped out. ”

Han He let people enter the cave to widen the cave, one is to widen the road to facilitate the march, to facilitate a large number of troops to sneak attack from behind, and the other is to irrigate, the total amount of water will also increase, the project should have half a month so far.

The most terrible thing is that if the Jin army uses this as bait, opens a hole in the Xianjun camp, introduces the Xian army into the cave and fights with the Jin army, without knowing the river, it kills into the cave in a big way, and the Jin army floods it with river water, then the Xian army in the hole is a place where there is no place to be buried, and at the same time, it can also use water to break down the Xian army camp, causing major casualties and chaos.

But when this kind of thing is said to Ding Yanghou, he will definitely not accept it. Not to mention that there is a natural karst cave underground, he doesn't believe it, this karst cave is more than ten miles long, all the way to the Xianjun camp, he won't believe it, if Zhao Xun says it, he can only make Ding Yanghou laugh.

"General Zhao, don't tell Marquis Ding Yang about this matter, I'm afraid that if he knows, not only will it be useless, but it will be self-defeating."

"This matter is also being considered, Ding Yang Hou is not a general, but he is a general, and he is a general, with his temperament, he will definitely not believe my words, let alone you.

Not to mention that General Ben has been stationed in Jiangdong for many years and has never heard of it, Ding Yang Hou and his soldiers are all from Jiangxi, and they don't know such strange news. But at the moment, the Jin army can't hold out, and our army doesn't know where its army is, how is this good. ”

Zhao Xun saved a little face for Ding Yanghou, and didn't bring out all the ugly words, perhaps because he thought of the overall situation of Xianguo, Zhao Xun didn't want to create more internal struggles.

At this time, Bailiyan said:

"General Zhao, I couldn't find out where the Jin army was last night, but I think that I can act according to the will of Marquis Dingyang."

"Why is this, if the Jin army strikes with thunder, won't our army be killed."

"No, the Jin army still doesn't know that we have already peeked into its secrets, so they will still follow the rules. If the Marquis of Ding Yang believes that the Jin army is in the city, he is afraid that he will start attacking the city tomorrow. In this way, as long as the attack lasts for two more days, our army will be able to dig through the secret passage leading to Duyang City. ”

"Ben will understand, if Han He has an embankment, the cave attack will be wasted."

"Exactly. Han He must have expected that our army would capture Duyang City with a cave attack, so he must counter our army's cave attack, and Han He will be in the city at that time. If our army could have a cavalry at that time to attack the Hanhe camp outside Duyang City, the general thought that the Jin army would be able to withstand it. ”

"You mean, Han He dispatched cavalry to dig caves by the river, and all 30,000 cavalry were transferred away, if our army attacked at night, the cavalry of the Jin army would not be in the camp!"

"Exactly, but Han He, just in case, calculated that on the day of our army's cave attack, he would presumably leave some cavalry behind to maneuver outside the city to prevent sideways, but there would never be too many.

In addition, from the river to Duyang, about eight miles, sixteen miles back and forth, plus the scouts were ordered to pass on the news, it took time for the cavalry to assemble and return, at most an hour to rush back to Duyang.

Therefore, it is necessary to grasp the time and take measures against the fighter with a slight delay. ”

Han He mobilized the cavalry to dig underground caves and took turns to work, so that the cavalry could quickly rush back to the camp. He had 30,000 cavalry, and even if he didn't have a carriage, he could still fight a decisive battle with the Xian cavalry with a cavalry advantage. But as long as there are no 30,000 cavalry, then the assault on the Jin army camp will be very smooth.

At that time, a cavalry raided the two large battalions of the Jin army, and once the Chinese army was discovered, it would immediately attack and capture Xichang, and capture it without a fight.

Han He may have expected that the cave attack would harass the Jin army camp outside Duyang City at the same time, but he would never have thought that the purpose of the Xian army was to go towards Xichang. As long as you don't love fighting, you can succeed in one blow.

Zhao Xun thought for a moment and made up his mind, he said:

And he acted accordingly. Thinking that on the day of the attack of the Marquis of Dingyang, he must send men and horses to harass the Jin army's camp outside the city, and then the general will take the initiative to ask for help, order the cavalry to go to raid, and capture Chang in one fell swoop. ”

"The general is wise, if this plan is successful, our army can decide the outcome of the battle."

In the eyes of the King of Jin, Ji Chang's life should always be worth some money, even if he doesn't spit out the land of Jiangdong, at least he has to negotiate a truce, as long as the truce, the national strength of the Jin State will be dragged in the Xian State, and it is often difficult to ensure that Zhiguo will not take the opportunity to sneak attack the Jin State, and it will not be difficult to recover Jiangdong at that time.