PS: Corrected later.......................................

Although the Wei army was under a lot of pressure, they still held on, did not relax for a moment, and never let Tuoba Liwei's attempt succeed.

Xianbei people are more and more impatient, repeated attacks have been frustrated, so that the self-confident and ambitious Tuoba Li Wei is no longer calm, if you can't take the Yanmen Pass, can't open the passage to the south, then this time the Xianbei people are likely to take advantage of the excitement and return in defeat.

So Tuoba Liwei decided to increase the intensity of the attack, build hundreds of more ladders, and carry out a saturation attack on Yanmen Pass, and take Yanmen Pass at all costs.

But when the Xianbei people poured all their strength into the attack, he found that the Wei army's defensive methods had changed, when the Wei army defended the city in the past, although it also used a large number of stones, but these stones were only thrown from the city, at most they could smash the besieging team, and there was no threat to the rear position of the Xianbei people.

But today there is a strange thing that has happened, these stones are like wings, they actually fly, they can fly far away, about two or three hundred steps away, and the power of the flying stones is even more amazing, whether it is the person who was hit by it, or the ladder and the vehicle, all of them have become powder, the thunder that fell from the sky, so that the Xianbei people are panicked, these stones are too fierce, there is nothing to avoid at all.

And these stones are not a small number, they are constantly flying up from the city, and they keep smashing at the ranks of the Xianbei people, and these stones seem to have eyes, and they are smashed in places where there are many people, and all the soldiers who are smashed are all flesh and blood, not to mention how miserable they died.

These Xianbei people were obviously frightened, and called these flying stones winged stones, in order to avoid these flying stones, the Xianbei people raised their heads one after another, staring at the sky, and when they saw that the situation was not right, they ran away.

It's a pity that there are not a few of these flying stones, they can avoid this, they can't avoid that, Xianbei people are exhausted, and naturally they have no ability to continue to focus on attacking the city.

The news was reported to Tuoba Liwei, and Tuoba Liwei personally went to the front of the battle to watch, and sure enough, the stones flew in front of the battle, and the Xianbei people scattered and fled.

Tuoba Li frowned slightly, as expected, these flying stones were shot by the kind of equipment called catapults, and it seemed that the reinforcements of the Wei army had arrived.

The facts are indeed the same as Tuoba Liwei's guess, when the Xianbei people's attack reached the sixth day, Cao Liang also rushed to Yanmen Pass as scheduled, and joined forces with Deng Ai Shibao.

After Cao Liang led the infantry troops to Yanmen, he greatly strengthened the defense of Yanmen, Cao Liang not only brought 5,000 people, but also brought the catapults, the biggest heroes of the attack on Jiuyuan, and 50 catapults lined up and climbed to the top of the city.

Whether it is on flat ground or at the head of the city, there is nothing special about the use of catapults, they are all the same, but the angle of attack needs to be adjusted somewhat, when attacking the city, the catapult adopts the upward attack mode, and when defending the city, it adopts the downward attack mode.

This is just a trivial matter for the catapult, and now the problem faced by the catapult is mainly the lack of ammunition, when attacking Jiuyuan, the catapult has almost exhausted the stone bullets stored by the Wei army, although these stone bullets can still be recycled and reused when cleaning the battlefield after the war, but it is only limited to those stone bullets that are not damaged.

Most of the stone bullets were killed with the target, so the number of stone bullets that Cao Liang brought to Yanmen Pass this time was not very sufficient.

But this doesn't seem to be difficult for Cao Liang, the ammunition used by the catapult is not only limited to spherical stone bullets, ordinary stones can also be thrown, but compared with spherical stone bullets, these irregular stones have a big gap in hitting accuracy.

However, against the Xianbei people who are like locusts, there are almost no requirements for the accuracy of hitting, as long as the catapult throws far enough and shoots high enough, it is enough to deal a fatal blow to the Xianbei people.

The catapult shot, it was really extraordinary, the power of the stones smashed down in the air was extraordinary, each piece had a thousand weights, the Xianbei people thought that there was a god to help, otherwise they didn't believe that anyone's strength would be so great, and it was really incredible that these heavy stones could be easily thrown into the sky.

In addition to the catapult, another weapon added by the Wei army this time is the repeater, which can play a greater role when defending the city, and it has an excellent ability to break through dense formations.

Ten arrows at a time, thousands of arrows at a time, hundreds of crossbows went to the city at the same time, and thousands of crossbow arrows poured down like a rainstorm of pear blossoms, and the threat to the Xianbei people was so great.

If the catapult has a huge deterrent effect on the Xianbei people, but the damage of the repeater crossbow to the Xianbei people is real, hundreds of repeaters, the formation of a death fan is so large, almost covering the entire north city wall.

In this case, the Xianbei people were very injured, and if the Wei army was fully equipped with catapults and repeaters, the defense of the city would be infinitely powerful.

This also reflects Cao Liang's adaptability from the side, there are already so many catapults, they are extremely heavy and slow to move, many people think that there is no need to carry it, defend the city and fight, just prepare more bows and crossbows.

However, Cao Liang insisted on bringing the catapult to Yanmen, although for this reason, the action time of the reinforcements was delayed for about a day, but once used, the effect was extremely powerful, so Cao Liang's far-sighted advice was unanimously recognized by the military personnel.

After this beating, the Xianbei cavalry seemed to have become sluggish, and many people often looked up at the sky unconsciously, for fear that a flying stone would fall from the sky and hit them.

Under such circumstances, it is very difficult to achieve major results.

Tuoba Liwei was quite depressed, knowing that now the Wei army's reinforcements are so strong, then Tuoba Liwei will definitely strengthen the offensive a few days ago, taking advantage of the Wei army's reinforcements to take Yanmen Pass one step ahead, the Wei army is defeated, and the catapults and crossbows will definitely not be equipped to the front line.

Withdrawing is already the only choice, after many unsuccessful attacks, Tuoba Liwei can obviously only reluctantly accept this situation, Yanmen Pass, after all, there is no chance to get involved.

The Xianbei soldiers retreated, but he did not return to the clouds, but set up camp not far from Yanmen Pass, ready to gather men and horses again and attack Yanmen Pass for the second time.

Tuoba Liwei is this breath, and he can't swallow it.