With such a huge population, they need food and water, and they can't last a day without food and water.

But what Qin Xuan could think of, others could also think of, the construction pattern of Iron Blood City was created by a master craftsman.

Iron Blood City is divided into two districts, the East and the West, and the total area of the city together is almost 100,000 square kilometers, and the area inside the city is very vast, and the city walls are built like the Great Wall.

With a huge geographical space, it is completely self-sufficient, even if it is under siege.

Iron Blood City needs to focus on defending only the southeast and southeast directions, the north and west are endless mountains, those places are covered with snow all year round and uninhabited, and the mountains are even more rampant with a large number of fierce beasts, which is not suitable for the activities of large armies.

And there are two vast bodies of water above the defense line of Iron Blood City!

Although the area of Iron Blood City is bloated, most places have natural barriers, and there are not many places that really need to be heavily defended.

It can be said that this place can really be regarded as an easy place to defend and difficult to attack.

Qin Xuan summoned the princes of all parties to a meeting in the military tent to discuss the plan to outwit the Iron Blood City.

Luoyue Immortal was the first to speak: "The plan of cutting off water and food will not work!"

"Iron Blood City itself has a huge detour space, there are lakes, rivers and other natural waters in the city that can be recycled, unless it is a great drought that has not been encountered in a hundred years, otherwise they will definitely not lack water!"

"And there is enough space in the city to detour, and there are huge food reserves, even if the city is besieged, they can still be self-sufficient. ”

"Yes!" Wang Yuanba followed, "The strategy of besieging the city is difficult to work, so let me take my brothers to attack!"

Qin Xuan sighed a little depressedly: "It's not impossible to storm strongly, but if we attack and take Iron Blood City, I'm afraid we will also suffer heavy losses!"

Hou Ruolan replied: "Yes, the battle in the city is very difficult to fight, and the people in charge of garrisoning in the city are all veterans of a hundred battles, they have experienced a hundred battles and are unruly, if they resist desperately, they will burst out with extremely powerful combat effectiveness!"

"What are you afraid of?" Wang Yuanba patted his chest and said, "Just let me take my brothers on it, and I will guarantee to take Iron Blood City within half a month!"

"Don't worry!" Qin Xuan said in a condensed voice, "As far as I know, it's almost the season to harvest grain, right?"

"Uh...... Collect grain?" Wang Yuanba frowned.

The Falling Moon Immortal immediately responded: "Yes, it's almost the season to harvest grain, and the snow rice cultivated by the Generation of Iron Blood City is about to mature, and it will be harvested in about half a month!"

"Okay!" Qin Xuan said in a condensed voice, "If you want to take Iron Blood City, you must first let them cut off the harvest!"

"Broken harvest?" Falling Moon Immortal asked puzzledly, "At best, we can only destroy the grain fields outside their city walls, but the grain fields inside the city walls, we can't reach them at all, and those grains are still enough for them to eat!"

Qin Xuan said in a condensed voice: "Although we can't completely break through Iron Blood City now, we can use long-range strikes to destroy their grain fields!"

"In the north of Iron Blood City, and in the west, aren't they all towering snow-capped mountains, send a group of powerful masters to climb the mountain, and then release rockets from the commanding heights of the mountain, burn their grain fields remotely, and crush their morale!"

"Rocket?" Falling Moon Immortal frowned, not quite understanding what Qin Xuan meant.

Qin Xuan asked, "Aren't your women's army a strong crossbow battalion, and what is the maximum range of their bows and arrows?"

"The strong crossbow of the Sisters of the Women's Army can even reach a maximum range of 40 kilometers, but the crossbow arrows are not lethal after flying out for a certain distance, and we want to shoot the enemy with arrows outside the city...... It won't be too good!"

"Enough!" Qin Xuan smiled faintly, "I didn't let them shoot the enemy directly, but destroy their grain fields!"

Hou Ruolan asked: "How can the bow and arrow destroy the grain field, even if the arrow is ignited, the snow rice grain field is all paddy fields, and the rocket can't burn up when fired into the paddy field, it's too tidal!"

"And even if they are lucky enough to burn, it is very convenient to get water from the paddy fields, and they can extinguish the fire without spending too much money at all!"

"Okay, okay, I'm going to explain to you now that it's useless, each of you will send out 300,000 strong crossbowmen to ensure that their maximum range can reach a distance of more than 30 kilometers, just let them bring their bows, and I will provide the feather arrows!"

After Qin Xuan went back, he set up a "burning arrow" specially designed to destroy the fertile land.

The arrow adopts an ordinary rocket design, filled with a small amount of **, so that the flame can be kept burning in a high-speed flight state, and the arrow shaft adopts a hollow tubular design, and the inside is filled with flammable oil.

The body of the arrow is very huge, the diameter of the arrow shaft is as thick as the shovel shaft, the length is more than one meter five, and the fire oil injected into a cloud-piercing arrow is more than 1000 ml, once the arrow body bursts and burns, it can completely detonate the range of more than ten meters around!

It is definitely not possible to use it to directly kill and injure elite legions, but it is more than enough to burn grain fields.

Qin Fang's production efficiency was very high, he produced tens of millions of cloud-piercing arrows in one day, and the next day Qin Xuan let the shooter team climb to the high point of the snow-capped mountain and condescendingly release powerful rockets into the city.

Suddenly!

After this wave of operations, the battlefield was completely detonated.

Rockets rained down from the sky like a rain of arrows, and when they hit the ground, they exploded with a large amount of oil and caused a fire in the city, even in the paddy fields.

When the oil falls into the water, it floats on the surface of the water, but it can still continue to burn, releasing a huge amount of energy.

Moreover, the flame of the oil body cannot be extinguished with water, and after the fire burns, the more you splash the water, the more fierce it burns, and it is impossible to stop it.

For a time, the flames in the Iron Blood City were soaring, and the flames were all over the place, and the sky-high firelight illuminated the dark night sky, extremely wild!

"Great, it's really good!" Seeing this, Wang Yuanba was overjoyed, "It burned nearly twenty percent of their grain fields in one day, and if it spreads at this rate, it won't be long before the entire Iron Blood City will become a scorched earth!"

Luoyue Immortal was still not at ease: "Even if we burn down most of the grain fields in the city, they still have a lot of grain in stock, these grain stocks are still enough for them to last for a long time, and in the end, they don't have to rely on a strong attack to take the city?"

Qin Xuan smiled faintly and said, "General Wang, you immediately send people to set up a space array around Iron Blood City!"