In the dim evening daylight, the white mist rose and gathered, and the water dragons continued to rush into the mist, and there was a rumbling collapse and a huge cracking sound in the depths of the fog that could not be seen by the eye. And the fog that filled the air carried a pungent and strange smell in addition to the smell of burning.

"What's going on? Don't...... Did the walls really collapse? All the soldiers and horses on both sides watched all this in a daze, not knowing what was happening.

The truth was soon revealed. As the sound of the collapse came intensively, a large number of stones rolled out of the door and appeared in everyone's field of vision. The large boulders crumbled and shattered, revealing striking white fractures. The water dragon poured on it, making a sizzling sound, emitting huge white smoke and naturally shattering into smaller stones.

Many people on both sides, including Han Desui and Yang Jun and others, instantly understood. Yang Jun's eyes showed excitement, seeing this, he finally understood what Ma Qingshan's purpose was.

From the very beginning, Ma Qingshan aimed at the stuffed things in the hole in the city gate. When Ma Qingshan learned that the other party used a huge bluestone to block the city gate hole to ensure that the city gate could be kept out after it was burned down, Ma Qingshan grasped this detail and had the idea of breaking through the city gate hole in his heart.

The specific method is to use fire oil and a large amount of wood piled up on the outside of the city gate cave to burn, when the flame burns, the gap between the huge bluestones in the narrow city gate hole is actually a huge hearth. At this moment, in the early summer, the south wind is rising, the wind is helping the fire, the fire will pass through the cracks in the bluestone, and the huge wind suction force is enough to turn the entire city gate cave into a passage of flames. Let the flames penetrate it with the help of wind suction, forming a calcining furnace. The principle is actually quite simple. Although it is impossible to describe it in words, it is not difficult to understand.

When the fire was raging, the people and defenders in the square inside the city of Xijin Mansion saw the dark red tongue of fire emerging from the inside of the city gate cave, and they all felt the burning sensation emanating from the city gate hole.

Ma Qingshan's intention was to burn all the bluestones in the city gate cave. Because he knew that the walls were built with triple soil, which could not be burned, and the more they burned, the stronger they became. However, although the bluestone block seems to be harder than the Sanhe soil, it cannot withstand the flame calcination. When the fire reaches a certain level, the bluestone will be calcined into lime. Of course, the temperature should be high enough and the fire should be fierce enough. That's why he used all the oil and a thousand logs from the hills as fuel.

Bluestone is calcined into lime, which is a well-known principle. But there are very few people who know how to use it on the battlefield and dare to try. Ma Qingshan not only dared to think, but also dared to do, in fact, he himself was not sure whether this method would work, after all, it was the lives of thousands of brothers to carry out this plan, if it failed, he himself would be a sin that could not be forgiven. But this time, horses

Qingshan couldn't manage too much, and he took this step boldly.

People and things in this world are often like this, and people who can stand out at certain critical times are showing different characteristics from ordinary people. It's not that he knows more than the others, or that he is very different from the others. It's that this type of people have a flexible and open perspective, and they dare to try something that others can't do. So in the end, they succeeded, not because they had more magical powers than others, but because they were willing to try and take risks. To put it bluntly, it is the strength of the heart and the spirit of daring to take risks.

Ma Qingshan is undoubtedly this kind of person. To dare to take such a huge risk to make such an attempt, it is obviously extremely strong in his heart. Of course, the consequences of the risk are unpredictable, and even Ma Qingshan himself is indeed not sure that this method will succeed. He just thought he could give it a try. Needless to say, if you fail, the rewards will be huge.

Right now, his adventure is paying off.

With the water dragon shooting, most of the bluestone stuffed in the city gate cave has become quicklimestone that can be broken by the touch of a button under the calcination of the fire. After being shot at the cold water, all of them begin to collapse and decompose. When the limestone decomposes, it produces a large amount of fog and heat, which causes white smoke to billowing from the entire city gate cave, and the hot steam house spreads with a slightly pungent smell of mist all around. A large amount of milky lime water flowed out of the gate hole.

What Ma Qingshan wants is not that the bluestone in the entire city gate cave is burned into lime, but that the bluestone will decompose and collapse after calcining. Only in this way can the city gate hole be penetrated in a short time. After the loss of the city gate, the open gate is an unobstructed passage. That's the key to the siege.

Han Desui was surprised to find this, he was already aware of the other party's intentions. Such an ingenious approach made Han Desui admire the ingenuity of the Great Zhou soldiers and horses. And I actually made a mistake. In order to pursue the effect that the castle gate hole was completely blocked and difficult to get through, he ordered the castle gate hole to be blocked with bluestone. I didn't expect the burning of the fire to have such consequences. If you knew this, it would be more practical to block it with mud and sand.

"The herald ordered that the square inside the city gate immediately build fortifications and mobilize five thousand ...... No...... Ten thousand archers went to stop it. They must not be allowed to storm the city. Han Desui shouted and ordered, and there was a hint of panic in his voice.

The soldiers and horses of the Great Zhou Dynasty were calm, and the water dragon still violently dissolved the limestone in the city gate cave. The water washed out a large amount of lime and flowed out of both sides of the city gate hole. At the same time, a large amount of water also has a rapid cooling effect. The scorching city gate and city walls are still difficult for people to approach, and the temperature is so high that it feels like it is about to be roasted, so it must be cooled down quickly. At the same time, the Great Zhou sappers began to rebuild the suspension bridge at the location of the damaged suspension bridge in front of the city gate.

The way they set it up was extremely simple and fast. Long bamboos were tied together and placed directly in front of the city gate on the opposite bank, where the fog was steaming and the heat was rolling. Hundreds of long bamboos form dense rows, which are then bundled and laid with long planks. In the previous few hours, everything seemed to have been rehearsed, and all the materials were ready. In this case, a trembling, but absolutely sturdy suspension bridge was built.

The Liao defenders on both sides of the city almost watched as they completed the drawbridge right under their noses. For they could not get any near the burning towers of the city, which had been burned by the flames. They can only harass with a small number of arrows at the maximum range of the arrows, and shoot at the crowd with a small number of bed crossbows. Although the Great Zhou soldiers and horses were shot and killed a lot without cover at all, they couldn't stop the other party from doing what they wanted to do.

Then came the most difficult moment, in order to ensure the passage of the city gate, Ma Qingshan had to order the soldiers to enter it to clean up. Because there is still a lot of rubble in the cave of the city gate. Even in the innermost part, the bluestone wall did not collapse, because the water dragon could not hit the innermost part. Although the bluestone there has been shattered by touch, it is still a complete stone wall. It only takes a little external force to collapse.

Ma Qingshan's purpose is not to become a smooth road, but at least to open a road. Extremely high temperatures, hot mist, corroded and hot limestone, hot ground that cannot be settled. Either one is a mortal danger. But in order to race against time to penetrate the passage, Ma Qingshan had to give an order for the soldiers to go in and clean up. These soldiers rushed in with two siege carts, whose mission was to use the huge iron cones of the carts to knock down the bluestone wall on the other side of the gate hole that had not yet collapsed. Only a thin layer of bluestone walls remains, which is suitable for rushing to the field.

Hundreds of Da Zhou soldiers wrapped their heads, faces and bodies in wet cloths, stepping on half-foot-high clogs under their feet, and drenched all over their bodies, pushed two rushing carts and rushed through the front line filled with smoke and water, and rushed into the city gate hole. As night fell, and there was smoke and fog everywhere, only the rumbling sound of the collapse in the city gate could be heard, and nothing else could be seen.

The soldiers of the Great Zhou who rushed in needed to withdraw before tea time and be replaced by another group of soldiers. Although adequate precautions were taken, casualties among soldiers could not be avoided. Some of the soldiers who had been evacuated in just a few tea hours had already been burned all over their bodies, some had their bare skin corroded by lime water, and some had fallen unconscious from suffocation.

In less than half an hour, more than a dozen groups of people were rotated in, and hundreds of people were burned and burned, finally, the good news came. The entire city gate has been completely penetrated. The two rushing cars blasted through the last blockage that was not enough to penetrate, and penetrated the entire passage of the city gate. The rubble inside and the large amount of limestone residue that the water hose could not decompose were also pushed to the sides with wooden rakes. The ground in the middle was hot, but it was already a smooth road.