Although Li Fu was temporarily evacuated to Yang'an Pass, and did not make perfect defensive preparations, but Yang'an Pass is Yang'an Pass after all, and it is famous for its danger and solidity, and the Shu army that launched the attack couldn't help but complain secretly, and I don't know who built Yang'an Pass so strongly, which added a lot of difficulties to the current siege operation.

The siege war was originally difficult to fight, and now the Shu army lacks large-scale siege equipment, just relying on morale, using the method of ant-attached siege, if you want to conquer Yang'an Pass, how difficult it is.

The battle has been fierce, but the Shu army has never been able to capture the city of Yang'an Pass, but has suffered heavy casualties and lost a lot of men and horses.

Jiang Bin and Wang She's faces were ugly, and after suppressing it for a long time, they finally caught an opportunity to raise their eyebrows, but unfortunately they were unlucky and did not attack for a long time, so that the two of them couldn't help but be depressed.

After attacking for three days in a row, Yang'an Pass still stood still, which made the morale of the Shu army obviously low, which was in response to the saying that one drum up, then decline, three and exhaustion. After attacking for three days in a row, he never succeeded in taking Yang'an Pass, which was undoubtedly the biggest blow to the morale of the Shu army.

All the generals understood that if they could not capture Yang'an Pass as soon as possible, once the Wei army sent reinforcements, then the situation of the Shu army under the city of Yang'an would become difficult.

Even Liu Yin, who has always been calm, seems to be a little unable to sit still at the moment, although the difficulty of Yang'an Pass is in his expectation, but after three consecutive days of strong attack, it can not shake the defense of Yang'an Pass, which makes him a little disappointed, if the war continues to drag on, the situation facing the Shu army will be extremely grim. It is likely that all previous efforts will be in vain.

The hearts of the generals were heavy. But everyone knows it. Although the Shu army is twice as numerous as the opponent, in the siege war, the defending side always occupies an advantageous position, and it is easy to offset the disadvantage of numbers.

Liu Yin walked back to the camp with his hands behind his back, wanting to talk to Deng Ai about how to get Yang'an Pass.

Deng Ai was sitting behind a few cases at the moment. The look was solemn and solemn, the light and breezy appearance of the past was completely gone, obviously, Deng Ai also knew that the battle of Yang'an Pass was very important, and if he could take Yang'an Pass, it would be equivalent to choking Zhong Hui's throat and cutting off the retreat of hundreds of thousands of Wei troops, if Zhong Hui was allowed to fight back at this moment, the situation would become very delicate again.

"Sir-" Liu Yin called softly, and Deng Ai sat there straight. Looking outside, I was distracted, as if I hadn't heard it. Liu Yin had no choice but to shout again and raise his voice a few degrees. "Mr. Ai—"

Deng Ai came back to his senses at this time, saw that it was Liu Yin, bowed his hand slightly, and said, "It's the lord, Ai is sluggish." ”

Liu Yin smiled slightly and said, "Is Mr. worried that Yang'an Guan can't be attacked for a long time?" ”

Liu Yin understands Deng Ai's state of mind at the moment, Deng Ai hates Zhong Hui to the core, the main reason why he took refuge in Liu Yin is that he hopes to borrow Liu Yin's hand to avenge him, even Deng Ai doesn't seem to have thought that the opportunity for revenge will come so soon, as long as the whole territory of Hanzhong is captured, Zhong Hui's retreat will be completely blocked, and Zhong Hui, who has lost logistics supplies, is not far from the day of defeat.

However, in front of the Shu army, there is still the last difficulty, that is, Yang'an Pass, only by capturing Yang'an Pass can it be regarded as completely sealing Zhonghui's retreat. But under the current circumstances, it is not an easy task for the Shu army to take Yang'an Pass.

Hearing Liu Yin's question, Deng Aiyou also smiled helplessly and said, "I'm afraid that's what the lord is thinking about, right?" ”

Liu Yin said: "I just want to discuss with Mr. and see if there is any clever way to take Yang'an Pass?" ”

Deng Ai groaned for a while, and said: "Li Fu is a confidant of Zhonghui, if you want to persuade him to surrender, it is almost impossible, if you want to attack it, I am afraid it will not work in a short time, why don't you follow the method of attacking Chang'an, and blow it up with gunpowder, no matter how strong Yang'an Guancheng is, it is not as good as Chang'an, right?" ”

Liu Yin couldn't help but smile bitterly and said: "If there is enough gunpowder now, why should I worry about Yang'an?" When attacking Chang'an before, the gunpowder had been exhausted, and now in the firearms department, there are only some grenades, gunpowder arrows and the like, which can hurt the enemy, but it is not possible to break the city. ”

The city wall of Yang'an Pass is different from the city wall built by rammed earth elsewhere, Yang'an Pass is close to the mountain, there is no shortage of stones, so the city wall of Yang'an Pass is mostly made of stones, such a strong city wall, it is not a few grenades can collapse, at least there must be gunpowder that collapses half of the Chang'an city wall.

Now the production capacity of the gunpowder workshop is limited, and the gunpowder produced in the past six months has been squandered all at once in the battle of Chang'an, and it seems that the production capacity of the gunpowder workshop will have to be increased in the future.

Deng Ai is very sensitive to gunpowder, when he was defeated on the top of gunpowder, hearing Liu Yin say that there are a lot of grenades and gunpowder arrows in the firearms department, Deng Ai's eyes lit up, and said: "The lord has both grenades and gunpowder arrows, which are enough to suppress the defenders of the city and provide cover for the siege troops." ”

Liu Yin never thought of this method, but the throwing distance of the grenade was limited, and if he wanted to throw it into the city, he had to stand under the city wall, and under the city wall was the area covered by the bows and arrows of the Wei army, which would inevitably cause a large number of casualties. As for gunpowder arrows, they can be used as ordinary bows and arrows, but their power is limited and they can't kill the enemy, so Liu Yin did not use firearms in the siege battle.

Liu Yin shook his head lightly and said: "The grenade throwing distance is short, and it is not easy to throw it on the city wall, but it will be shot by the enemy archers, so it should not be used lightly." ”

Deng Ai smiled slightly and said, "Then why don't the lord condescend and throw himself into it, showing the power of firearms?" ”

Liu Yin suddenly realized: "Sir's intention, presumably to take advantage of the mountain situation of Jigong Mountain to throw firearms on the mountain?" ”

Deng Ai said: "Yes, Yang'an Ping leans on Jigong Mountain, as long as he sends someone to steal Jigong Mountain at night and throws firearms on the top of the mountain, he can easily throw it into Yang'an Guancheng." At that time, Liu Yin occupied Jingjun Mountain on Yinping Road, condescendingly, and blew Deng Ai's troops upside down, Deng Ai had suffered such hardships, and naturally knew the tactics of firearms.

Liu Yin was overjoyed, and immediately asked Ah Jian to come over, saying: "Ah Jian, you quickly take the firearms department to seize Jigong Mountain overnight, and use firearms to attack Yang'an Pass from Jigong Mountain, be sure to concentrate firepower, and also tear a hole." (To be continued.) )