Three days later, under the witness of hundreds of relatives and friends, Guo Song married Dugu Youlan as a side concubine, and soon, the dowry team of the Dugu family came to Zhangye City, and also brought the canonization of the Son of Heaven, officially crowned Dugu Youlan as the side concubine of the king of Zhangye County, and gave a pair of white jade bracelets.

After entering October, the weather is as cool as a day, Anxi and Beiting immigration is gradually coming to an end, this round of more than 7,000 households with a total of 35,000 people signed up to move west, of which forty percent are from Longyou, Guannei and Guanzhong areas, three acres of Yongye field, the temptation of lifelong tax exemption makes it difficult for many families to refuse.

The last group of about 1,000 families under the escort of 1,000 cavalry, with a yearning for a better life in the future, took a mule cart to Beiting, they went to Gaochang County to settle down, it was the beginning of November, after they arrived in Gaochang, it was time for snow.

Early in the morning, Guo Song galloped all the way with dozens of generals and more than 1,000 cavalrymen to Heigang, 20 miles southwest of Zhangye.

In fact, after returning from Anxi, Guo Song has been paying attention to the development of iron fire thunder for nearly half a year.

Gunpowder formula and solution, but the difficulty is in the iron shell casting, they even secretly dug the best blacksmith from Chang'an, invested tens of thousands of dollars in research and development, a full five months, by dozens of top craftsmen and firearms battalion soldiers repeated trials, experienced hundreds of failures, and finally succeeded step by step.

The test site was not in the Heigang Military City, everyone was worried that the power would be too great, and the explosion would collapse the Heigang Military City, so they found the test site in a valley forty miles to the south, which was surrounded by valleys, and the sound of the explosion could not alarm Zhangye City.

At noon, the group finally arrived at the test site, where hundreds of tents had been set up in the wilderness outside the valley, where craftsmen and firearms battalion soldiers had been living for more than two months, and had replaced Heigang as a firearms development and testing site.

Yang Jun took everyone to visit the test site, he pointed around and said: "This area is barren and inhabited, and the herdsmen will not come." And there are a lot of rocks in the valley, which is just right for testing firearms. ”

Liang Wu was a little anxious, "I said General Yang, we're not here to enjoy the mountains and rivers, hurry up and get to the point, okay?" ”

Guo Song glared at Liang Wu fiercely and said with a smile: "Actually, I can't wait a little too!" ”

Everyone laughed, Yang Jun scratched his head embarrassedly, and hurriedly led everyone to the big tent, there is a big tent covering an area of two acres in the front, this is the king tent of Shatuo, the king tent has two, one is an egg-shaped tent, one is a plum blossom tent, Guo Song gave the egg-shaped tent to the firearms battalion, and became the warehouse tent of the firearms battalion.

The big tents of the nomads are all leather tents, strong and warm, can withstand the blizzard, this big tent is a double leather tent, a circle of barracks is built outside, there are soldiers patrolling and standing, the inside is covered with a thick wool carpet, and more than a dozen firearms are classified and stacked.

Outside there is a table on which are the protagonists of the day, two iron-clad fire thunderbolts, one the size of a pumpkin and the shape of a pumpkin, and the other is a large gas cylinder entirely.

"This little one doesn't seem to be made of iron?" Guo Song found that the color of the small iron fire thunder was wrong.

Yang Jun hurriedly said: "The envoy is right, this small is bronze, the small iron shell can't be exploded, the bronze alone has tested dozens of kinds, and finally found the most suitable bronze formula, one-time casting molding, must be cast at one time, otherwise the power will be greatly reduced, the pottery mold cast alone is difficult to make, and the casting technology is not something that ordinary craftsmen can do, only two people in the whole world can do it, and they are all here." ”

Yang Jun is very proud, just because of the difficulty of creating an iron-shelled fire thunder, he is not afraid of being learned by others.

Guo Song stepped forward to test the weight, the small one was about 20 catties, and the large one was more than 100 catties, so it was okay and could be used on different occasions.

"Was the experiment successful?" Guo Song asked with a smile again.

"I've succeeded more than thirty times, that's why I dare to invite the envoy!"

Guo Song suddenly had confidence and said happily: "Let's start!" ”

.........

The test site is in a semi-enclosed valley, the valley is gourd-shaped, there is only one entrance and exit, the valley covers a vast area, about hundreds of hectares, and the test is mainly carried out in a large valley.

First carry out the test of the small fire mine, the small fire mine is placed around hundreds of wooden stakes, driven deep into the ground, 70 steps away from the wooden stake is placed a small stone cannon, this kind of stone cannon weighs more than 100 catties, is generally carried by camels, also called the whirlwind cannon, can throw more than 20 catties of stones to seventy or eighty steps away.

Everyone immediately understood that this kind of small fire thunder was used on the battlefield, especially against the nomadic cavalry, dozens of fire mines exploded in the crowd, it was simply spectacular, although the porcelain fire thunder had been used, but compared to the power of the iron fire thunder, it was still a small thing.

'When! While! While! The bell rang, and all the soldiers quickly retreated to the outer valley, where only two soldiers remained in front of the whirlwind, one of whom lit the arquebus.

Yang Jun hurriedly shouted: "Everyone cover your ears!" ”

Everyone hurriedly covered their ears, 'Bang! The whirlwind cannon shot out a small iron fire thunderbolt, and the two soldiers immediately covered their ears and lay on the ground.

The iron fire thunder fell into the wooden stake, only to see a burst of firelight, followed by a thunderous explosion, and everyone squatted down involuntarily.

Thick smoke rose into the air, and after a while, everyone followed Guo Song into the valley, only to see that hundreds of wooden stakes disappeared more than half, which is completely different from the porcelain fire thunder, after the porcelain fire thunder exploded, at most a dozen wooden stakes around it were blown off, and most of the wooden stakes would be nailed with porcelain pieces, and the iron fire thunder directly blew up most of the wooden stakes, and its impact force was dozens of times that of the porcelain fire thunder, which also means that the killing range of the poisonous nails inside will be greater.

Everyone couldn't help but applaud, Yang Jun waved his hand a little proudly, "Don't worry, everyone, there are more powerful guys!" ”

He couldn't hold back the excitement in his heart and shouted, "Start installing!" ”

Dozens of soldiers rushed up, they dug a hole under a huge rock weighing tens of thousands of catties, filled it with more than 100 catties of iron fire mines, sprinkled fire oil outside, and everyone rushed back.

Guo Song waved his hand, "Everyone squat down and cover your ears!" ”

Even though they were a mile away, everyone was nervous.

One of the soldiers lit a powder arrow and threw it at a boulder a hundred paces away, and he immediately burrowed into the pit where he was dodging, covering his ears tightly.

The gunpowder hit the oil, and the gunpowder arrows burst into flames, igniting the oil, and the flames spread rapidly, igniting the fire rope, and then an earth-shattering explosion was heard, 'Boom! The earth shook, and many of the soldiers cried out, and they were so shocked that they closed their eyes.

In a moment, countless sand and gravel fluttered from the sky, and everyone could feel the sand and gravel falling from the sky from a mile away, and after waiting for a while, everyone slowly opened their eyes.

Everyone looked at each other, and it was difficult to hide the shock in their eyes, they didn't pay attention to the porcelain fire thunder, but the power of this iron-shelled fire thunder made them shocked.

I saw that the valley was filled with gunsmoke, and gray smoke shrouded the entire valley.

Guo Song's expression was solemn, and he walked directly into the thick smoke, and everyone followed, and after a while, they came to the place of the explosion, and the smoke also dissipated, only to see that the boulder was blown into countless pieces, rolling down at the foot of the mountain, and a big crater appeared at the place of the explosion.

Guo Song couldn't hold back the excitement in his heart, and struck him hard, and the power of this explosion met his expectations, enough to blow up the city.

After the test, Guo Song brought Yang Jun over and said to him; "This time it was very successful, hard work everyone, each person will make a great merit once, reward ten taels of silver, from now on, you will be promoted to Zhonglang General!"

Yang Jun knelt down on one knee excitedly and said, "Thank you for your cultivation!" ”

Guo Song smiled slightly: "Although you have successfully taken the first step, there is still a long way to go, and I ask you to do the following things next." ”

Yang Jun stood up and nodded silently,

Guo Song said slowly: "First, establish the strictest system as soon as possible to prevent the leakage of fire and thunder technology, create a core circle, allow a very small number of people to master this technology, and then give them the best treatment, hide their names, and their families will also be strictly protected by internal security soldiers." ”

"The humble position has been taken into account, at present, there are a total of twelve soldiers who have mastered the gunpowder formula, and there are only two craftsmen who have mastered the iron shell casting technology.

"That's good, and then the second point, mass-produce iron fire mines, mainly large iron fire mines, I think they are more powerful.

Third, it is necessary to continue to strengthen research and development, for example, the technology of the fire rope must be improved, and it must be burned accurately and at a uniform speed in order to protect the soldiers of the firearms battalion, and it is also necessary to develop fire mines for exploding ships on the water, and it is also necessary to develop burning firearms.

The last point is to cultivate talents, which is not contradictory to the first point, in addition to the core secret of gunpowder, other affairs also need a large number of talents, such as casting iron shell talents. ”

Yang Jun nodded heavily, "Keep your teachings in mind!" ”