If the flood can't wipe out all the enemy forces, what will happen to the Xuanwei army? Regardless of it, it is impossible, they came out of Anyuan County to fight, to annihilate every enemy who invaded Qinzhou, and if the enemy retreats, they must pursue.

If the enemy retreats, they will definitely follow the path they are familiar with, and if the casualties are acceptable, they may eventually retreat to Dongxing Town, accumulate strength and then counterattack, and if the casualties are too large and the losses are more than half, they can only retreat.

Withdraw from Qinzhou, everything is easy to say, but continue to rely on the land of Qinzhou and do not leave, the Xuanwei army can only fight with them head-on, but now far away from Qinzhou City, the supply is difficult, just these days of rations are very economical, if not the people of Nasuo Town have food in stock, and help the Xuanwei army, the Xuanwei army will be hungry soon, and if it really wants to fight the enemy head-on, the battle line will be infinitely extended, and the victory or defeat will be uncertain.

Just when Yang Congyi was sitting in the camp and meditating, how to use his back hand, whether to transfer all the Xuanwei army to the west bank of the river, detour south before destroying the dam, and intercept the enemy's retreat, the old patriarch came to visit.

"Are you worried about the storage of water?" The old patriarch asked with a smile.

Yang Congyi nodded without hesitation: "That's true, the water level is rising very slowly now, at the current rate, it will take at least three days for the water to flood the top of the dam, but the water level will only rise more and more slowly, maybe it will take ten days and half a month, so I am wondering if I want to dig a ditch from the middle of the dam." ”

The old patriarch smiled: "Actually, adults don't have to worry at all, it will rain soon this day, and a rain can flood the dam." ”

After speaking, seeing that Yang Congyi was puzzled, and even had some questions, he explained: "I am old, my legs are cold, and my legs hurt badly when it rains. ”

"Is that true? If this is the case, then it is really God helps the Great Song Dynasty, and God helps the Xuanwei Army. Yang Congyi saw that the old patriarch was rubbing his knees, knowing that what he said was true, and the dark clouds in his heart suddenly dispersed.

"With the experience of old decay, this rain will fall in an hour, and it will not be small. Some of the barracks at the bottom of the hillside had better be moved to the woods on the hill, otherwise when the rain came, they would be uninhabitable. The old patriarch kindly reminded.

"Thank you, Patriarch, I'll let them move the barracks up." Yang Congyi immediately thanked him, and then shouted: "Come on, go and call Yao Chang and Luo Cong over." ”

After a short time, the two entered the camp, and after greeting the old patriarch, they heard Yang Congyi say: "The patriarch just told me that it will rain heavily in an hour, and you will move all the barracks built at the bottom of the hillside to the forest on the mountain. Also, if there is no major incident, it is strictly forbidden to cross the embankment regardless of anyone after the rain, and those who violate the order will be engaged in military law! ”

The two of them took the order and left.

The old patriarch did not leave, but chatted with Yang Congyi in the barracks about the history of their Nasuo people, and also told him about his own experience.

After more than 500 years of development, it has become a small town, with a radius of ten miles, more than 300 households and thousands of people. There are mountains in the north and south of this place, there is a river in the middle, the terrain is flat, the land is fertile, and there is no need to worry about food and clothing, but it is inconvenient to travel, far away from the Central Plains, and can not read or see the world.

This old patriarch, according to him, studied in Qinzhou for a few years when he was young, and later went to Yongzhou and Guangzhou, Guangzhou is the farthest place he has ever been, and no one in the whole town has gone further than him, so in Nasuo Town, he has the widest knowledge. I know the government, and I also know the court.

But when he heard that the current capital was in Lin'an, he was very surprised, and even asked if the Khitans were threatening Bianjing by going south? Then Yang Congyi told him that the Liao State of the Khitan people had been destroyed by the Great Song Dynasty and the Jin State more than 20 years ago, and later the Jin people occupied the land of the Khitans, and their power increased greatly, and they snatched away hundreds of state capitals in the north of the Great Song Dynasty, including Bianjing, and now the land of the Jin people north of the Huai River.

The old patriarch listened in disbelief, and then sighed.

While chatting, I suddenly heard a commotion outside the camp, which was small at first and gradually became louder.

"The rain is coming, adults can rest assured." The old patriarch smiled.

"The patriarch is like a god, and if he says an hour, he will do it for an hour." Yang Congyi got up and glanced at the camp gate, turned around and smiled.

"Where, where, overrated, old decay is just a few more years to live, and I have seen more. Now that it's raining, it's time for the old man to go back. The old patriarch stood up.

"It's raining heavily, wait for a little lighter before leaving."

"This rain, in an hour or two, is not small." The old patriarch walked to the camp gate.

Yang Congyi no longer held back, and instructed the guards in front of the camp: "Send the patriarch back." ”

The old patriarch thanked him repeatedly, but the guards ignored him, but still sheltered him from the rain and quickly sent him back.

Looking at the heavy rain outside the camp, Yang Congyi's hanging heart finally landed.

With this heavy rain, the water level should rise quickly, and perhaps within two days, the water will be able to overflow the dam, by which time the Xuanwei army should have retreated to the hills west of Nasuo.

It rained heavily all night, and it was not until the next morning that the rain gradually subsided, and in the afternoon it stopped completely and the sky gradually cleared.

Yang Congyi stood on the hill and saw that the water was still nearly a foot high from the top of the dam, but he was not worried, the north was mountainous, and it would take time for the water to gather, and by midnight, the river should overflow the embankment.

When it was dark, he sat alone in the camp to practice, from the first watch to the second watch, and when the third watch was about to arrive, a guard said outside the camp: "Supervise the army, the spy has a military report." ”

"Let him in." Yang Congyi slowly finished his work, and then got up.

The spy, covered in mud, walked into the barracks and reported: "Supervisor, the enemy has appeared opposite the town of Nasuo and is trying to cross the river. ”

"What the specific situation is, you can tell me in detail." Yang Congyi sat down.

"In the evening a small group of enemy troops appeared on the other side of the river, and because it had just rained, the river was muddy, and they did not know the depth, and they did not find a boat on the other side, so they did not cross the river easily, and when it was dark, they got a wooden raft, and five or six men carried it to this side of the river, and then they entered the town. On the other side of the river, except for a few dozen people who remained on the riverbank, no other enemies were found for the time being. The spy said.

"Okay, Nasuo Town doesn't need to be watched anymore, and all the spies will be recalled by noon tomorrow." Yang Congyi commanded.

The spies were ordered to leave.

The enemy that appeared in Nasuo Town must be the outpost of the enemy army, and the follow-up army should not be far away, and it is estimated that before noon tomorrow, it should be able to reach the opposite side of Nasuo Town.

Fortunately, the weather was beautiful, and a heavy rain reopened the water for the depleted river, but the upper reaches of the river were cut off, and as soon as the rain stopped, it did not take long for the enemy to meet the bottom, and the enemy who could not find the boats to cross the river, seeing that the water level of the river was lowering, was likely to wait for the water to completely recede, and then cross the river on foot. This river is big, the flow is not small, it should be able to last until tomorrow, and when tomorrow, the upstream water overflows the embankment, and it can inject water into the river, and it is not so easy to flow through. Whether the enemy crosses the river or is stopped by the river depends on whether the bottom of the river dries up first, or the water level overflows the top of the dam first.

However, depending on the speed of the water level, it is estimated that the top of the dam will be flooded tomorrow morning.

"Supervise the army, send the military intelligence on the other side." Yang Congyi was thinking about the water level and the enemy army, and the guard entered the camp gate with an arrow.

Yang Congyi took the arrow, took down the letter tied to it, and unfolded it to take a look, only to see that it was also a military information sent by spies, saying that the enemy army had set up camp three miles away from Nasuo Town, and it was expected to start early tomorrow morning, and arrive at the west bank of Nasuo.

Seeing this news, Yang Congyi was both excited and nervous.

Excitedly, the enemy army finally came, and they would soon be able to annihilate them in one fell swoop and sweep away all the enemies in Qinzhou.

Nervous is afraid that they will cower and where to station, and their outpost spies will run to Huashi Town, once they find that the enemy army on the north road has been wiped out, the enemy army on this road is afraid that they will not dare to step forward again, and even temporarily retreat, and they are afraid that they will start early tomorrow morning and take advantage of the low water level of the river to directly flow across the river.

This night was destined to be sleepless.

Su Zhong and Pan Cheng did not send military information, since the enemy had already arrived near Nasuo, they should have retreated to a safe area long ago, and they didn't know how many casualties they had, so the damage should not be too heavy.

Yang Congyi was a little flustered, so he had to meditate and calm down.

On the third day, just after dawn, before Yang Congyi got up, an officer on duty at the embankment came to report: "Prison army, the water has flooded over the top of the dam." ”

As soon as he heard the news, he hurriedly got up and walked quickly out of the camp to the embankment a mile away.

I saw that the water surface was already flush with the top of the dam, although the top of the dam had not been completely submerged, but it was only a matter of time, and it may not take half an hour for the water to cross the dam and re-inject into the big river outside the dam.

"The order is to be sent down, and all the spies downstream are to evacuate the danger area before noon." Yang Congyi's impetuous heart completely calmed down, and the water flooded the embankment, and the enemy army could not escape, so they were all trapped in the west of the river, waiting for the fate of being swallowed by the water.

He stood a distance of more than a foot from the embankment and looked at the huge lake to the north, and suddenly felt a little soft under his feet, and when he looked down, he saw that the soil layer under his feet was loosening, and he was slowly sliding into the lake.

Startled, he immediately turned around, glared at the ground, reached out and grabbed a stake, and ran down the hillside.

When he stood still three feet away, and before he could turn back, he heard a sound of water, turned his head to look, and saw that the piece of soil he was standing on just now had slipped into the lake, making a large splash of water, and layers of water ripples.

"Pass the order down, and it is strictly forbidden to go within five feet of the embankment." After speaking, Yang Congyi turned around and walked farther up the hillside.

The soldiers on duty saw a large area of mud sliding into the water five or six feet deep, and they dared to approach the guard, and retreated to the high place of the hillside.

After Yang Congyi retreated a few zhang, he looked at the embankment from the hillside, and felt that it was not complete, the hills on both sides of the river, soaked in the lake, have been soft, maybe it won't be long, there will be soil sliding into the water.

"It is ordered that no one is allowed to come within ten feet of the embankment, and no one is allowed to leave the camp." Yang Congyi gave another order.

As soon as the herald left, he heard the sound of water, and another layer of soil slipped into the water.