Di Qing ordered the personnel to dig this tunnel, and left a few turns to ensure that the power of the explosion would not be transmitted, but they still had to run, this was a tunnel, it was temporarily excavated, and it was a tunnel dug in pursuit of speed.

It's not very stable in normal times, let alone when the explosion comes, maybe the power of the explosion can make this tunnel collapse, so you have to run out.

Running for life, this may be the idea of the ignitor of the dynamite, after seeing the dynamite blow up the city wall, no one wants to try it in the center, and the result of the attempt is only one, that is, death.

Even if it was much less than this amount of explosives, mixed with a few other things, it would be able to cause a large area of Jedi, and this time the number was even larger.

Fortunately, this problem was taken into account when it was designed, and while they were running wildly, the fuse simply did not reach the area where it could explode.

In fact, when these two people escaped from the tunnel, the fuse still did not reach the position, and in a place where no one saw, the fuse was burning wildly, neither fast nor slow, and death was about to come, but General Liao still didn't know anything.

The current Liao general is very strange, although the rain of arrows obscures most of the sight, but as far as he can see, the other party does not take this opportunity to attack the city.

This made many of his arrangements fall through, but is this really good, don't take advantage of the archers still have physical strength, with the help of long-range siege, and after that, the strength of the archers drops, and they attack the city against the attack, so is it good?

There are such doubts in his heart, but General Liao still made a simple arrangement, if it is really a siege, it will not be easy to deal with, so simply avoid the rain of arrows.

The Liao general entered the city tower, which is all brick and stone structure, and even ancient enough to be repeated hundreds of years ago.

In the hands of the Liao State, the Zhejin Mansion has been expanded, but the effect of this expansion is not good, in fact, the most powerful defense of the Zhejin Mansion is always more than a hundred years ago, the Han people built, the Khitan may be in the field of heavy cavalry, the crown of the entire East Asia, what is the defense, do they understand.

Although the long arrows are terrifying, the armor-piercing arrows are even more terrifying, but in the face of the big bluestone that is more than two feet long, this thing really can't be penetrated, listening to the sound of the arrow rain outside, looking at the distance, the battlefield filled with arrow rain, the Liao general's heart, on the contrary, is relaxed.

I took out a few long arrows casually, this is just now, when I entered the city tower, I fished it with my hands, touching the sharpness on it, the Liao general's heart moved slightly, and the weapons of the Song army were even stronger.

Liao, in terms of smelting, is not as good as the Northern Song Dynasty, the invincible Tielin Army, their armor, whether it is protection, or various indicators, compared with the Song army, is a grade worse, if it is not for the Liao State is rich in war horses, with war horses to offset the gap between the two sides, Liao State can still suppress the Northern Song Dynasty like this?

According to the quality of these long arrows, the armaments and equipment of the Northern Song Dynasty, their quality, is obviously a grade higher than before, and what is even more terrifying is this density.

How many Song troops are at the bottom, General Liao will know it with a little look, no less than 90,000, no more than 110,000, even if 110,000 are all archers, to ensure this speed, how fast the rate of fire must be, not to mention, obviously, there are about 20,000 infantry.

In this sense, General Liao can be regarded as a capable person, just by looking at it from above, he will look at the army of the Northern Song Dynasty, and even make targeted arrangements, if Di Qing didn't bring a longbow and explosives, the original infantry of the Northern Song Dynasty that was strengthened alone would really not be able to take the Zhejin Mansion.

Unfortunately, at some point, backwardness will be beaten, and when industrialization produces a revolution, technological leadership will bring an overwhelming advantage, and this advantage is not only practical, but also cognitive.

For example, the Liao State has never seen a longbow, so even in the initial engagement, no mistakes were made, but in the end, under a single look, more than 2,000 archers were lost, for example, now, when the fuse of the explosives is burning underground, the Liao army still knows nothing.

Underground, a huge fuse, burned rapidly, and eventually, entered the range of gunpowder, which was provided simply by the Ding Navy, not as before.

According to the use in Western Xia, there are several experiments, many times, explosives were put in, but the final effect is not so good, many times it has not had the desired effect, the explosion is fried, but there is no final effect.

If it is replaced by an ordinary siege, even if the effect is not good, it is acceptable, but this is Zhejin Mansion, this is Nanjing of Liao, and it is the most core place in the entire sixteen states of Youyun.

Only success is allowed and failure is not allowed, so long before the war, the Third Division took the initiative to mention it to Ding Haijun and asked if there was a solution or to provide some better quality.

Explosives were exposed to Han Qi by Zhao Xin when he was in the Daimyo's Mansion, but from beginning to end, Zhao Xin did not inform the Northern Song Dynasty that the perfect formula for explosives, that is, some craftsmen, found that the explosives were somewhat similar to those gunpowder in the Northern Song Dynasty before, and conducted research, but unfortunately did not study the reason.

Regarding thermal weapons, this point is the core of Ding Haijun's current core, and almost everything is responsible for Zhao Xin.

Although the black powder has been removed from the mainstream thermal weapon charge of the Ding Navy, the overall power is not small at all, and the person in charge in Tokyo can't decide at this moment, so it is passed to Zhao Xin.

For this, Zhao Xin did not hesitate, Youyun is a big deal, even if he has other ideas, he will not think of destroying the Northern Song Dynasty to take Youyun.

Thermal weapons were first proposed by Zhao Xin, of course, they were also the most thoroughly studied, and the experimental report of the forbidden army was also sent back, and the results of the research at that time were very simple and the combustion was not sufficient.

Don't underestimate this, don't say that in this era, even in the 21st century, there will be insufficient bomb burning, but it has been industrialized and avoided.

What Zhao Xin provided to the Northern Song Dynasty was pure gunpowder, and the fuse was there, but it was placed casually, and with the loose manual work of the Northern Song Dynasty, there would definitely be problems, and when the impact of the explosives was sprinkled and buried without being completely burned, it would not be so powerful.

Ding Haijun has studied thermal weapons in great depth, and although he has not yet produced a cheap iron cannon that can be mass-produced, there are still copper cannons and other explosives, especially the fuses of copper cannons, which have also changed from being casually made at the beginning to being relatively accurate and strict, and in this case, there is no problem in making a few bombs.

Thermal weapons have the advantage of this, you give the physical object, but do not give the manufacturing method on the premise, you can use it, but you can't make it, this is the good place, solve the problem, and don't have to worry, there will be a series of problems in the end.

This thing that can be called a large bomb, according to 10 stone as a standard, is almost equivalent to 500 kilograms, but unfortunately this is only black powder with added materials, it is much more powerful than ordinary black powder in terms of power, but it is still black powder, if it is all made of nitrocellulose, and some nitroglycerin explosives, the power is several times higher than this.

No matter how simple it is, he is also an explosive, with great power, 500 kilograms, blowing up a pillbox, or even the reinforced concrete structure of the base, it should not be much of a problem, which is also the key to blowing up the city wall.

A total of 16 large bombs were provided to the Song army, which were not randomly arranged, but the gunpowder that he had arranged separately through experiments, and then there were at least 3 circuits of the fuse to ensure that each part would be fully burned and would not affect each other.

Now, when the fuse is ignited, as long as it enters the area of explosives, it means that the explosion can no longer be reversed.

Through the reasonable arrangement of the fuse, in an instant, the gunpowder that was fully ignited exploded instantly, releasing a large number of huge gases, and then the power of chemical energy expanded outward, and finally, everything was torn apart, which was a shaking like an earthquake.

Because of the obstruction of the soil layer, I can't hear the sound of landslides and cracks, but the huge force, most of which has acted on the city wall, the Liao army on the city wall, suddenly felt that under their feet, it is no longer flat, but like the water surface, the waves are turbulent.

Itself, the solid camp, suddenly chaotic, some of the weaker protection, also destroyed, and at this moment, the longbow attack has not stopped, when the explosives exploded, countless longbowmen, still unstoppable towards the city, pouring the fury of the bow and arrow, this anger, will produce huge damage.

Just in this instant, there may be hundreds of people who were directly killed and injured under this attack, and when the energy catharsis reached an extreme, which has exceeded the limit that the city wall can bear, the city wall was immediately broken, and a large gap was formed.

The city is broken? This is not only the idea of the guard, but also the idea of all the Liao troops who have just woken up from the landslide and the crack, thinking that it is extremely strong, even if there are 100,000 troops besieging the city, it is not a problem to break the city wall, it is so broken, how did the Song army do it, is it difficult, is there really witchcraft.

From the beginning of the siege to the present, the casualties of the Liao army have been very heavy, 3000 archers, caught off guard, lost almost half, and then were shot by longbows, as well as the impact of explosives, cumulatively, close to 5000.

In other words, 5,000 is nothing, the entire Liao country, there are as many as one million troops, but under the current situation, there are only 15,000 people, it is estimated that the reinforcements from the surrounding areas have not arrived for more than ten days, I am afraid that they will not arrive in a short time, they have to face 100,000 troops under the premise of no city wall, or the elite forbidden army of the Northern Song Dynasty.

Even if the guard is from the royal family and has strong self-confidence, it is impossible to feel that he can be ten in the field, it is almost impossible, and it is under the premise of losing morale.

Retreat, this thought, rose in the guard's heart, and then became more and more violent, but unfortunately, it was too late, because the attack of the Northern Song Dynasty had already been opened again, and one by one, at the moment when they were swaying just now, they had already broken through the boundary and rushed up.

Under the cover of explosions and longbows, almost 15,000 heavy infantry had already crossed the line of contact between the two sides and rushed towards the gap, the first of which were the two most elite thousand-man teams.

Among the 15,000 heavy infantry, almost 10,000 were the original heavy infantry, and the forbidden army of the Northern Song Dynasty, because of the appearance of the longbow, carried out a series of adjustments, from the original heavy infantry to the longbow, and the heavy cavalry and heavy infantry were auxiliary, this change was huge, and brought about a significant improvement in the combat effectiveness of the Northern Song Dynasty.

In the past, the main force in the army was heavy infantry, which was supplemented by a small number of archers and crossbows, and the heavy infantry was the most elite type of troops, which also played a defensive and lethal role.

The decrease in number, or even the decrease in importance, does not mean that these classes have become second-rate, and all ranged troops, in the era before the development of thermal weapons, have an important problem, attacking the strong and defending the weak.

Under the premise that the attack power is invincible in the world, once they are close and do not give them a distance, then it will be a nightmare, and even some simple troops will cause huge damage to the longbowmen when they are close.

Compared with other types of troops, the longbowmen are already very good, the time to pull apart is faster, and the range is longer, but some natural weaknesses must be solved, so the heavy infantry and heavy cavalry came into being.

They were all for the longbow to distance themselves and provide time, and although the number was reduced, the standard was higher for them, and their task was more important.

Overall, when the number is reduced to one-tenth, the conditions for selection are gradually enlarged, and the forbidden army itself is the best of the best, and now, it is even more so, strength, height, and even physical strength, which are very good in this aspect, will be selected into the heavy infantry, and the infantry armor that assists the Ding Navy is even more armed to the teeth.

Only in this way can we be able to block and defend in the face of the charge of the enemy's superior forces, otherwise, when the opponent's strong charge rushes over, it is broken through, and even they can't stop it, and those longbowmen who only have a knife to protect themselves can do it, I'm afraid that soon, they will be slaughtered.

Now, put them in the field of siege, that really makes the best use of things, at the beginning of the bombing of the city, they have been arranged to a position about 300 steps from the city wall, with the power of explosives, they quickly moved forward, quickly crossed each other's positions.

300 steps, for a soldier advancing at full speed, may be less than 30 breaths of time, can be crossed, for a fully armed, heavily armored warrior, no more than 60 breaths, at this moment, the fluctuation of the city wall, has not finally stopped, there are constantly all kinds of broken stones, falling downward, but this part of the infantry rushed up without hesitation.