Although the iron mill casting cannon has used hot air technology, so that the temperature of the molten iron is higher, which can effectively promote graphitization and form high-quality gray cast iron, which has been improved a lot compared with the molten iron with high white-mouth casting, and can also cast bubbles, but for the sake of safety, Wang Song still decided to make copper cannons.

It is a matter of the safety of the war situation, the life and death of thousands of soldiers, the slightest sloppiness on the battlefield, no accidents, in order to prevent explosions and other accidents, for Wang Song, it is best to cast a bronze cannon now.

The land of Hebei and Henan is rich, and there will be no problem with the supply of copper.

The hardness of the fine iron used in the casting cannon is not enough, and it is easy to whiteize, and the iron cannon chamber cannot withstand the chamber pressure of granular gunpowder, which can easily cause an accident of exploding. Bronze has good ductility and is easy to process. Bronze cannons can reach a lifespan of more than 1,000 rounds, while cast-iron cannons are only about half of those of bronze cannons.

The melting point of copper is less than 1100 degrees, which is about the same as gold and much lower than that of iron.

Master Hu also said excitedly: "Xianggong, if you use iron fan to cast a cannon, one month should be enough." Xianggong Ancestor must have been born in iron, otherwise how can he understand the mystery of this?"

"This official just has an occasional experience!"

Wang Songwei sweated and said: "From now on, a few of you cannon casting masters and apprentices in the iron workshop will be incorporated into the army and under the control of the army!" Building artillery is a major military matter, but the Jurchens cannot be allowed to gain technology. After the war is over, where do you go, this official will not force it!"

Master Hu and Master Li were both solemn, Master Hu said: "Don't worry, although the little old man is not talented, he also understands the truth of being loyal to the monarch and serving the country, and will never do anything like forgetting his ancestors and betraying his ancestors!"

Master Li also said: "The husband is for the country and the people, and the old man admires it so much!" The old man will remember the teachings of the father-in-law!"

Wang Song nodded and said: "Meritorious service will be rewarded, the cannon casting is successful, Tianyou and the two masters have contributed the most, each person will be rewarded with 50 yuan, and the others in the workshop will be rewarded with 10 yuan."

Master Hu and the others were all smiling, and they bowed together: "Thank you villain!"

The craftsman dispersed, and Ma Kuo stepped forward and whispered:

"Xianggong, do you really want to provide 300 artillery pieces to the Hebei Loyal Army?"

"The eldest husband is above board, how can he abolish the public because of personal gain?"

Wang Song nodded, and his voice was a little lower.

"Ma Xuanzan, order Yue to command, move the whole army forward, garrison the front of the Daizhou and the Daimyo's Mansion, and wait for the opportunity to fight with the Jurchens."

Ma Kuo smiled bitterly: "Xianggong, what if Yue Commander does not obey military orders?"

Wang Song also shook his head with a wry smile and said, "It's going to rain, my mother is going to get married, let him go." The decision can be issued, let Dong Xian and the others abide by the military order, and there must be no gap with Yue's control!"

Ma Kuo nodded and asked again.

"Xianggong, don't you go to the camp of the Hebei Loyal and Righteous Army?"

"What if you go, it's just to add to your troubles."

Wang Song waved his hand, frowned, and said: "The Northern Expedition of the Hedong Loyal and Righteous Army, this matter is already imminent, this official doesn't want to be distracted anymore, you can inform Yue of this matter, and then quickly return to Hedong, the mobilization of the army is already urgent!"

Wang Song raised his head and said to Lin Tianyou: "Lin Tianyou, how are you preparing for the gunner training?"

"Don't worry, Xianggong has started since half a month ago, and now Brother Li Xiaochun is in charge!"

Wang Song nodded. Training is just a skillful exercise, and these old men in the army never need to worry about themselves.

"Intensify your training, it will be of great use when the time comes!"

The sharp weapon of the militarism, stepping forward from the beginning, is now waiting for the first batch of bronze cannons to be born.

With these sharp weapons in the army, it is bound to give the murderous and tyrannical fans a blow to the head.

"Xianggong, the Northern Expedition restored Taiyuan, and there were so many states and counties in between, if you want to restore them one by one, I don't know how much time it will take. In winter, field battles outside the city are not the strength of our army. ”

In a barracks in the Li Cheng camp, Ouyang Che frowned thoughtfully.

Recently, the morale of the army was high, and the soldiers were excited about the news of going north to restore Taiyuan. As Wang Song's staff member of the Xuanfu Division, Ouyang Che obviously had other worries.

"Brother Ouyang, you don't need to recover one by one, the surrounding states and counties will be ignored, and the army will go north directly and go straight to Taiyuan, this is a "frog jumping tactic", or a "beheading tactic"!"

Wang Song said categorically, causing a burst of amazement from everyone in the barracks.

Wang Song's move imitated the "island-hopping tactics" used by the Chinese army to occupy the islands in the Pacific Ocean occupied by the Japanese invaders.

The island-hopping tactic does not adopt the tactics of recovering each island one by one, but after recovering one island, skip the next island, and capture the next island, especially the relatively strong and stubborn Japanese islands, and isolate the islands occupied by the Japanese by means of island hopping and air blockade, forcing them to finally surrender, so as to greatly improve the progress and effectiveness of the recovery.

That is, relying on this "island hopping tactic", the Mi army made the defense chain established by the Japanese invaders become fragmented, and they could not take care of each other, and a large number of personnel and war materials were consumed in vain. It is this "island-hopping tactic" that allows the Mi army to return to its old place after two years of loss in the Philippines.

However, unlike the later Mi Army, the Loyal and Righteous Army wanted to attack the Jurchen army, which was also the most elite Wanyan Yinshu Department in Hedong, and directly ignored the local garrisons under the control of the surrounding Jin people.

The Mi army relies on its powerful naval and air forces, and Wang Song relies on himself, and he wants to fight a fast and epoch-making "blitzkrieg".

To be honest, Wang Song felt that it was better to use the "decapitation operation" as a metaphor for this operation. Taiyuan City is the head of Hedong Road, and the places where the Jin soldiers are entrenched are the torso and limbs.

Say anything, you have to cut off this "head" and fall to the ground!

"Xianggong, this move is too risky!"

Ma Kuo was still hesitant. The strength of the Jurchens is there, and when the time comes, it will be field battles and siege warfare, and the recruits of the loyal and righteous army, he really has no confidence in his heart about the Baisheng Xiong soldiers who are in charge of the Jurchens.

"Wanyan Yinshu is a fierce general on the battlefield, and the one who is stationed in Taiyuan City is also the elite under his command. I'm afraid that before we can attack the city, we will be defeated in a field battle!"

"Ma Xuanzan, you always like to tell the truth!"

Wang Song laughed, made a joke, and then said with a straight face: "This official is just going to do it with Wanyan Yinshu, so that he can also know how powerful my big Song boy is, don't think that I have no one in China!"

His face was solemn, and he said: "Although Taiyuan has been dilapidated, Wang Yu and Zhang Xiaochun led the people of Taiyuan to defend it for more than 200 days. If Taiyuan can be restored as soon as possible, it will be a great encouragement to the people of the Great Song Dynasty and the Great Song Dynasty! ”

Zhao Huan's letter, between the lines, is all about the urgency of restoring Taiyuan. It can be seen that the foundation of the Son of Heaven is not stable, and he wants to restore the confidence of the government and the opposition in the royal family and court of the Great Song Dynasty with this set of great victories.

"Xianggong is right, if you want to fight, you will beat the elite of the Jurchens!"

Ouyang Che's chest was hot, and he said loudly: "If the loyal army wants to become a strong army, it has to fight against strong enemies. If Taiyuan can be conquered, our subjects of the Great Song Dynasty will be overjoyed and high-spirited. Once Taiyuan is restored, the golden soldiers in the eastern parts of the river will also collapse, this is a clever move!"

Ma Kuo's heart was shocked, and his face turned red by half.

He may have fought against the Jurchens, lost too much, and lost the courage and flesh to win.

"If Xianggong really wants to conquer Taiyuan City, if he finally wins with a thunderous blow in a short period of time."

Mark finally stopped objecting and offered his opinion.

"As the following officials know, although the Jurchens in Hedong are numerous, the anti-Jin forces in various places are also surging. Xiang Gong transferred all the way from Hebei to the elite, stationed in the Weisheng Army, stuck in the throat south of Taiyuan, so that the advance and retreat will not be lost, and there is no worry about hindrance!"

Ma Kuo always wanted to use any opportunity to transfer some of the soldiers and horses of the Hebei Loyal and Righteous Army to expand the ranks of the Hedong Loyal and Righteous Army.

In his opinion, Wang Song gave power to Yue Fei like this, and did not send either Zhang Heng or Dong Ping to supervise the army, and with only Dong Xian and Niu Tong, the strength was too weak.

"There is no need to mobilize people from Hebei!"

Wang Song shook his head and said, "Liang Xing and Zhao Yun's subordinates are now stationed in Zezhou and Longde Mansion, and they are enough to deal with the stragglers of some Han people."

Seeing that the persuasion had no effect, Ma Kuo raised one last bit of doubt.

"Xianggong wants to conquer Taiyuan City, what is it? If the city cannot be broken quickly, a stalemate will be formed outside the city, and the reinforcements of the Jurchens will come, and the army will be flanked from the front and rear, and there is a danger that the whole army will be annihilated. ”

He said solemnly: "The Jurchens broke the Liao, Yelu Yujun, Yelu Mawu, Xiao Temou, Liu Yanzong, Shi Liai, Geng Shouzhong, this is generally the old ministers of the Great Liao who actively run for the Jurchens, and the heart of the Great Song Dynasty will not die." With the Liaodi Han'er driving it, the Jurchens have already done their best to defend the city or siege the city. ”

He raised his head suspiciously, opened a pair of eyes and asked, "Unless Xianggong has some special way to break the city, otherwise, the Northern Expedition to Taiyuan City can only be a joke!"

"Xianggong, there are tens of thousands of golden soldiers in Taiyuan City, which is not easy to deal with!"

Chen Dong also said in a deep voice: "The Jurchens besieged Tokyo City, and they couldn't break the city even after surrounding it for more than a month, so there was a thunderous blow from Xianggong!" If a gentleman does not stand under the dangerous wall, the prime minister must know that the traitorous ministers in the court are eyeing the prime minister, and they must not be sloppy!"

"Guys, what you say is true!"

Wang Song nodded and said solemnly: "Don't talk about Taiyuan City, it is Tokyo City, or a city that is several times stronger than Tokyo City, and this official can also let him collapse the city wall in an instant." Do you believe it or not?"

Ouyang Che, Ma Kuo and the others all looked at each other and didn't speak for a long time, obviously shocked by Wang Song's words.

After a long time, Chen Dong opened his mouth and asked, "What the minister said, is it true?"

He was in Taixue and knew the situation in the court, Wang Song had offended too many treacherous people, and once the Northern Expedition failed, it would be a catastrophe.

Wang Song Zhengse said: "Military affairs, how can it be child's play, every truth can be proven!"

Everyone looked at Wang Song with straight eyes, and their hearts were like being struck by lightning. Wang Song's ambition was hesitant, and everyone believed it in their hearts.