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Several people nodded one after another, it really needed to be controlled, but in their expressions, it was obvious that they didn't treat it as a very important thing.

Gu Xinyu thought in his heart, now you actually still have a glimmer of doubt in your heart, but when you see the power of this kind of thing, you will never take it lightly

Gu Xinyu once again carefully described the power and consequences of this weapon, which theoretically deepened the impression, and now what is missing is the actual test.

After some discussion, some plans were preliminarily decided, and how to control that area was handed over to Hou Ye, and there were some tents and other items that Hou Ye also needed to prepare.

And then there are some other small details, many of which will be refined and supplemented after tomorrow's field tests.

The afternoon passed quickly, and the days of the northern winter were very short, and when it was a little dark indoors, the secret conversation ended.

Gu Xinyu was the last to walk out of the house, and there were snowflakes floating outside, and Gu Xinyu found that there was a lot of snow this winter.

Some snowflakes landed on the corners of her mouth, and she curled up with the tip of her tongue, as she used to do when she was a child, and ate the snowflakes into her stomach.

Because of this action, I remembered Zhou Muhan, and it suddenly snowed in the Swan Lake, which had been frozen before.

Gu Xinyu also did the same action as now. But when he wanted to do it again, he was held down by Zhou Muhan, lowered his head, and kissed the snowflake at the corner of her mouth between his lips and teeth.

Gu Xinyu was full of nostalgia, looking into the distance abruptly, victory or defeat will be in one fell swoop tomorrow, no matter what, you must succeed!

There was no word for the night, and the next morning's morning soon arrived.

After Gu Xinyu and his father had breakfast, they sorted themselves out. Because the temperature has been a bit low lately. Therefore, there is also a charcoal brazier in the car.

She only brought Chunli and Xiaotian, of course, Wangcai and Shuangxi had to follow, and Gu Xinyu had to bring them too.

Pack light. After meeting with Grandpa Guo at the gate of Rongcheng. And he went out of the gates. Behind were two carriages pulling saltpeter and jars, and Gu Xinyu's carriage was of course walking in the middle of the line.

At a three-fork entrance, the Hou Ye Zhou Tianhao, who came from the barracks, was also waiting there with three carriages. The car was loaded with some of the supplies needed for yesterday's discussion.

It's really easy to get things done.

Gu Xinyu sighed, because this time it was not as leisurely as the last caravan trip, everyone had something on their minds, of course, the speed of the journey had also increased a lot, and it was also early to leave, so it took three hours to reach the destination.

If this is if the Hou Ye lets the horse run wild, it will not take two hours.

At this time, the accompanying carriage was placed not far away, and then the Hou Ye arranged for the sergeants to surround the people within a mile of here, and do these security guard work, Gu Xinyu led everyone to a lake.

At this time, the surface of the lake did not freeze because of the oil gushing out of the ground, but because of the snow yesterday, the lake surface was black and white at this time, and there was a strange smell in the air, which made this place a mysterious and strange color.

Gu Xinyu didn't talk nonsense, she asked Xiaotian to bring a wooden bucket and a gourd scoop for water, and then the sergeants brought the saltpeter and jars in the car.

Gu Xinyu asked the eldest brother to prepare the fire fold.

After everything was ready, Gu Xinyu asked Xiaotian to scoop out the black liquid in the lake with a gourd scoop and put it into a wooden bucket, because it was an experiment, so one bucket was enough for the time being.

The black liquid is sticky and smells weird, but fortunately, it is winter, and it doesn't smell so bad, Gu Xinyu thought, why did he forget to make a mask.

Alas, sometimes, it's just not thoughtful to think about things.

Soon, the barrel was full, and according to Gu Xinyu's instructions, Xiaotian and a sergeant carried the barrel to the open space in the distance, and then on the carriage, they moved down a wooden barrel, opened the lid, and put water in it.

This is also a method that Gu Xinyu thought of temporarily before he slept last night to better reflect the power of black oil.

Everything was ready, and Gu Xinyu motioned for Xiao Tian to pour a barrel of black oil on the ground.

Gu Xinyu told everyone to stand back, and after the distance was safe, Gu Xinyu lit a fire, so that Xiao Tian, whose wrist strength was amazing, was still on the black oil that had fallen to the ground.

In an instant, a flame ignited on the black oil, and then a hula spread, and the flames burned unscrupulously.

It is accompanied by choking fumes and gases.

Fortunately, everyone had already covered their mouths and noses at Gu Xinyu's request, but their widened eyes were all incredulous shock!

It's one thing to hear about it, it's another thing to see it with your own eyes.

The flames burning in front of him seemed to burn everything in an instant.

Soon the pungent smell faded, and Gu Xinyu walked over with Xiaotian and stopped a few steps away.

"If you pour this oil on the city wall and set it on fire, what will the enemy use to extinguish the fire?" Gu Xinyu asked.

"Water, of course!" Grandpa Guo knew that there must be a mystery when Gu Xinyu asked like this, but the fact is that the best thing to extinguish a fire is water, so he answered it happily

"That's right, there will definitely be water to extinguish the fire, Xiaotian, take a few steps back and splash the water over!" Gu Xin said to Xiaotian in a loud voice.

Xiao Tian picked up the bucket and threw it at the burning flames.

Everyone knows that "adding oil to the fire is more vigorous", and they have seen it with their own eyes, but today is the first time in their lives that they have seen water on the fire, and the flame is not only not extinguished, but also burns more violently.

This incredible scene really appeared in front of everyone's eyes, and everyone watched the black oil burn more and more violently like looking at a terrible monster, and it was even half a human-high fire in an instant.

At the age of Grandpa Guo, he was also dumbfounded.

"Everyone, let's see it, let alone the city wall, even the moat will burn violently!" Gu Xinyu said loudly again.

What a terrible thing, after everyone was shocked, their eyes were solemn, this kind of black oil that could probably burn a city with just a fire break was too terrifying.

As long as you can splash this black oil on the city wall, then tie the arrow to the fire fold and shoot it out.

Then it may only take an arrow to burn the city, and even the moat will burn.

Add the water that the enemy uses to extinguish the fire, and the city will soon be captured.

Almost no soldiers.

What a terrible and terrifying existence this is.

The eyes of the people present were fanatical, and they all thought so in their hearts.

And Gu Xinyu stood quietly aside, but sighed in his heart, maybe he was about to become the source of evil.

But this world is so cruel that no one can have it both ways.

Grandpa Guo and Hou Ye suddenly strode towards the lake, staring at the black oil floating on the lake with eager eyes, and were silent for a long time!

[Thank you for your continued support, this time from the 515 Fan Festival of the Writer's Hall of Glory and the General Election of Works, I hope you can support it.] In addition, there are some red envelopes on the fan festival, get one and continue the subscription! (To be continued.) )

PS: At the request of the baby, May 1 plus a more chapter, thank you again too (2) for the reward! There is also a monthly ticket for the guardian angel of the book city and the self-confident baby, I wish you all a happy long holiday~~