Li Yi was listening intently, but Qiu Feng strode in, he walked in front of Li Yi with a letter sealed with fire paint, and said in a deep voice: "This is a secret letter from Ling Feng, I heard that Duan Siping's light cavalry has all crossed the Yuan River. ”

"Oh!" Li Yi couldn't help but be taken aback, and hurriedly took the seal and opened it to watch.

In the letter, Ling Fengyu reported that the 8,000 elite cavalry led by Duan Siping, Gao Fang, and Dao Hongying had all crossed the Yuan River in only three hours, and in this way, they were only more than 200 miles away from Yangbahe City.

If all goes well, they will be able to capture the city in two days. After the letter, he said that the so-called cut off of the Yuan River was only artificially cut off by them, and this was also greatly assisted by Peng A, the general of the Great Yi Ning State. In addition, two chain bridges were temporarily erected on the Yuan River, which was also an important passage to ensure the smooth crossing of Duan Siping's army.

Seeing this, Li Yi also secretly admired that Duan Siping was really scheming. At present, it seems that the so-called Yuanjiang River is simply impossible. While using this to confuse the enemy, they were already ready to use another hand. Whether it is erecting a chain bridge or cutting off the water source of the Yuanjiang River, this chess game of building plank roads and darkening Chen Cang has even been directly deceived.

Li Yi looked up to the sky and sighed, once Duan Siping crossed the Yuanjiang River natural danger, the sheep and the city were already within reach. In this way, the news of the loss of the city will be the heaviest blow to Yang Huaiying, and the loosening of the Jinning defense line is just around the corner, and the Shanxian Mansion will be in danger.

However, the Yunnan side has wasted two precious days, and still can't take a step forward, and is helpless against the Songyang Pass in front of it, and it is said that it has completely failed in this competition.

Li Yi frowned, but he couldn't do anything. Alas! It is not surprising that the army in Yunnan has been in peacetime for too long, and there are no good generals who can strategize, although they have won two big victories in succession, but they are all in the case of passive defense, with the help of foreign aid, and they are all won by hard fighting. And when faced with siege warfare that requires ingenuity, it seems to be at a loss.

At this time, Xiao Hui, who had not spoken out all this time, suddenly spoke: "Dashuai, since the twin peaks of Songyang Pass are sandwiched, we can overlook Songyang Pass from the mountain, can we think of a way in this regard." It's best to look at it on the spot, and you might be able to find a clever way to break the city. ”

Li Yi's heart moved, and his eyes couldn't help but show appreciation. Oh, yes! Adapting measures to local conditions is the only way to solve the problem, and Xiao Hui's statement is exactly what he wants.

Although he has been here for two days, Li Yi still has a comprehensive understanding of the specific terrain situation. Sandwiched between two high cliffs, Songyang Pass is invulnerable at a glance, but it may be possible to find a way to defeat the enemy. As soon as he said it, Li Yi immediately decided to terminate the combat meeting and go to the two cliffs to observe and talk.

Under the guidance of the guide, Li Yi, Jian Zheng and others worked hard and finally climbed to the ridge of the high cliff on the left. Not to mention the hardships of this journey, it is even more difficult to transport supplies here.

When climbing to the top of this not tall cliff, there is no way ahead, and a cliff wall that is four or five zhang wide and more than ten meters high stands in front of you, blocking the way forward. In front of it is the city wall of Songyang Pass, but in this position you can see nothing, only a slight glimpse of some vague scenes at the back of Songyang Pass.

Li Yi chose a slightly advantageous position, and observed through the telescope that this position was only more than 100 meters away from the Songyang Pass in a straight line. However, due to the steep terrain, there is no way to pass through.

The guide who led the way told me that the name of this place was Eagle's Beak Cliff, and ordinary people couldn't walk here. And because the terrain is too difficult, Zheng Lian is not worried that someone will spy on Songyang Pass from here. Therefore, there is no need to send people to defend the city wall in this position.

Li Yi nodded secretly, the most difficult thing to pass through in this place is the Eagle's Beak Cliff. If this eagle's beak cliff is blown up, along the steep ridge, you can smoothly reach the south wall of Songyang Pass, the vertical distance from here is only a dozen meters, you can not only go to the south city wall from here, but also according to the favorable terrain, with a bow and arrow down to attack the enemy in the city.

But the most difficult thing now is that this eagle's beak cliff is huge, and how many explosives will have to be used to blow it all up.

After returning to Shuai's tent, Li Yi immediately sent someone to invite Feng Qi and Xi Guan over and told the two of them his thoughts.

After hearing this, Feng Qi said without thinking: "Don't worry, Brother Xi and I have made explosives that are several times more powerful than before, as long as we find the right detonation point and bury some more explosives, two or three rooms of rocks can blow it up." ”

Xi Guan also nodded and said: "What Brother Feng said is that not only can you blow up the rocks now, but if you can get close to the city wall, I think even the city wall that is several feet thick can blow up a gap." We carried hundreds of explosives this time, and as long as the commander gave the order and escorted us to the city wall, we could do everything we could to blow up his city wall. ”

Li Yi couldn't help but be overjoyed when he heard them say this. Hehe! Originally, the purpose of bringing them was to facilitate the launch of rockets and thunderstorms, and at most to use gunpowder to ignite the city gate of Songyang Pass.

But now it was learned that the two had made gunpowder that was so powerful that it could be used against impenetrable walls. This is really good, this advantageous condition, how to say that we must make full use of it.

After some discussion by everyone, it was finally unanimously decided that the work of blowing up the eagle's beak rock and the city wall of Songyang Pass was carried out at the same time. First organize people to plant explosives in two places, and Xi Guan is responsible for blowing up the eagle's beak rock, and do not ignite it after planting the explosives, and wait until the explosives at the city wall are planted and detonate at the same time.

The work of planting explosives at the city walls was much more difficult. Under the cover of rushing the car, Feng Qi was responsible for leading people to carry out this work.

In order to distract the enemy's attention, use bed crossbows and stone throwing carts to carry out a round of attacks on the enemy first, weaken the enemy's defensive strength, and wait until the chariot advances to the city, move several arrow towers forward, and use rockets and thunderbolts to launch a diversion attack on the enemy troops on the city wall in turn, so that Feng Qi and others can dig tunnels and plant a huge number of explosives.

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