In the early morning of the next day, Sun Fan and Yu Cheng came to the Qiwang Mansion as originally planned. Pen Fun Pavilion www.biquge.info [Mobile phone, tablet to read novels, please visit m. directly, update faster, more traffic saving]

When Ding Sanshi heard the news, he naturally welcomed him.

"Sun Fan, you can be regarded as free, come to the old man's place.

Quick, inside please.

Look at the tea! ”

After a few polite words, the three of them sat down.

Sun Fan went straight to the point, "Elder Ding, you should know my senior brother, right?" ”

Hearing this, Ding Sanshi immediately nodded and said in affirmation, "Yu Cheng, I know." This kid has a very lively brain, and his attainments in formation are no worse than my old guy. ”

"Then the concentrating cannon he designed, you must have known something about it?"

Ding Sanshi thought that Sun Fan came this time to pull him in. So as soon as he heard Sun Fan mention this, his head couldn't turn around.

"Shaped cannon? Just the thing you used as a freshman*i? That was built by the old man himself. ”

Hearing this, Sun Fan immediately looked happy, "It's so good." The kid was blunt. Ding Lao, what do you think is the obstacle to the mass production of cast iron shaped cannons? ”

When Ding Sanshi heard this, he didn't answer immediately. Instead, he stared at Sun Fan's eyes and looked at it for a long time. "Are you serious?"

"I'm serious."

Hearing this, Ding Sanshi's eyes immediately shone with bright sparks, even more dazzling and beautiful than a meteor that pierced the night sky in the middle of the night.

On the surface, Ding Sanshi didn't seem to have much interest in Yu Cheng's concentrating cannon. But in reality, this is not the case.

It is even no exaggeration to say that the energy cannon designed by Yu Cheng is the biggest knot in Ding Sanshi's heart.

Ding Sanshi has been keen on refining weapons all his life, even if it is to create a king-level divine soldier, it is also a matter of easy access. But when it came to building the Shaped Cannon, it failed.

And it was a fiasco.

Although the design plan of the Yucheng energy cannon was denied by Ding Sanshi. But this is also his choice as a last resort when there is a shortage of funds.

Therefore, as soon as he heard Sun Fan talk about the technical problems of the energy cannon, he was extremely excited, "Although there are still some flaws in the theoretical design of the Yucheng energy cannon, the general direction is correct. The problem is basically in terms of building.

After years of research, the old man has found the best way to forge the gun body, muzzle, gun mount, and the formation pattern on it. But for the heart that installed the demon crystal, it is still a bitter solution. ”

Hearing this, Sun Fan unfolded the drawings while recalling the structure of the cast iron shaped cannon, "I will find a way to solve the problem of the heart."

What the kid wants to know now is what level of Shaped Cannon you can build without thinking about the heart. And what level of shaped cannon can be mass-produced? ”

Although Ding Sanshi was extremely excited, he still had his basic sense.

"Just by virtue of you, kid, you still want to solve the problem of building a heart? I think you're thinking too much about this.

Don't talk about anything else, as long as you kid can build it, the simplest cast iron heart, the old man will only look to you in the future. ”

Looking at Ding Sanshi's conspiratorial look, Sun Fan immediately sneered, "If I can't build it, what do you want me to do?" Is it to worship you as a teacher, or to provide you with funds to research the Gathering Cannon? ”

Ding Sanshi's thoughts were seen through by Sun Fan at a glance, so his old face immediately "soared" and turned red.

"Ming people don't say dark words, if you can't build it, just like Bai Nalan Peak as a teacher, you will also be a registered disciple under my door.

As for the spirit stones, forget it.

After all, in the current situation, to solve the problem of concentrating the heart of the cannon, the old man needs inspiration, not money.

How's that, promise? ”

Hearing Ding Sanshi's words, Sun Fan immediately smiled slightly, "Then I'll give it a try." ”

As soon as he said it, Sun Fan did what he said.

When he came to Ding Sanshi's forging room, the retreat was developed.

……

The golden space in the furnace of heaven and earth has not yet been opened.

Therefore, if Sun Fan wants to win the gambling contract, he must rely on his true skills.

Detailed drawings, ample materials, Nine Heavens Dragon Flame, and such an outrageously experienced technical advisor as Old Immortal. That's all he had to rely on to make a bet.

As for the odds.

Before stepping into the Ding Sanshi forging room, Lao Immortal said that Sun Fan's chance of winning was thirty percent.

But after stepping into the Ding Sanshi forging room, the odds immediately soared to ten percent.

In the meantime, all changes were due to a black lump in the corner of the forge room.

"Sun Fan, go and get that black bump!"

Sun Fan looked at the drawings in his hand, and more than a hundred question marks had been drawn in his mind. How can he have the time to deal with it, and the old man who doesn't do the right thing as soon as he comes out will not die.

"What black bumps, can they be eaten, or can they be exchanged for money? You have that spare time, hurry up and come over to give me a staff officer, a staff officer, how should this cast iron heart be built? ”

Faced with Sun Fan's ignorance, Lao Immortal immediately raised his toes and scolded violently, "Sun Fan, don't look at that bullshit drawing." Quickly pick up the black bump for the old man.

It's a treasure that is rare in a hundred years. With it, not to mention the cast iron core, even if it is a steel core or a cold iron core, it can be created! ”

Just heard this, Sun Fan hadn't reacted yet. But after waiting for a second, he stumbled on the spot, and fell directly to the ground in excitement.

"Where's the treasure? What black bumps?! ”

The old immortal flew away and personally instructed, "This is it!" ”

Hearing this, Sun Fan couldn't walk a few steps, and then bent down to pick it up, "Isn't this the waste that Ding Sanshi threw here?" Old immortal, you can't be mistaken. ”

"Whew! You don't have to think about it, if Ding Sanshi knows the goods. What's your turn to pick up the bargain here? ”

"Isn't this just an ordinary piece of black iron?"

Hearing this, Lao Immortal immediately put on a good look, "This is not an ordinary piece of black iron, haven't you noticed it?" It's much heavier than you might think of black iron. ”

Because the iron is not big, so don't talk about it, Sun Fan really didn't realize this.

"This weight is at least seven times that of ordinary black iron, it seems that we have really picked up a treasure this time."

"Of course. With it, the old man can guarantee that the golden space will be opened within three hours! ”

Hearing this, Sun Fan couldn't help but secretly speak, after all, he still underestimated the value of this black bump.

"This ...... What the hell is it? ”

"Have you heard of the Heart of Black Iron? Inside this piece of black iron, there is a heart of black iron. I think Ding Sanshi, he must have been unable to refine this piece of black iron, so he picked it out as a scrap. ”

When Sun Fan heard this, he immediately instinctively swallowed a mouthful of saliva, "Black Iron Heart? Is it the heart of black iron that can only be bred by tens of billions of tons of black iron veins?!

Damn, it's really developed this time!

If this thing were sold, how much would it be worth?!

10,000 seven-grade spars? Or 20,000? ”

Looking at Sun Fan, who was dancing, the old immortal immediately gave birth to a sense of helplessness that was difficult to communicate with him.

"If you dare to take it out.

I promise, you won't even have a chance to hide in the Crucible of Heaven and Earth.

They will be destroyed directly! ”

Hearing this, Sun Fan was stunned for a moment, and then with a look of regret, he threw the black bump into the furnace of heaven and earth, "I'm just joking, let's leave it to you to open the golden space." ”

……

Three hours later, the old immortal successfully opened the golden space.

From now on, refining weapons and refining medicine will no longer be difficult for Sun Fan.

Cast iron feeds into the furnace.

The Nine Heavens Dragon Flame was calcined with all its might.

In less than a minute, a perfect cast iron core was created.

Exit and entry hall.

When Ding Sanshi saw Sun Fan, he immediately rubbed his hands together with a smile like an old fox who had seen his prey, "It's still early, why did you give up so quickly?" ”

Hearing this, Sun Fan didn't say anything, just gently put the cast iron heart in his hand on the table.

When Ding Sanshi saw this, his eyes immediately stood up.

"You kid isn't yin me, isn't this heart already built by you before?

But that's not right either. In this Huaiyang City, except for the old man, there should be no one who can create a cast iron heart. ”

As he spoke, Ding Sanshi picked up the cast iron heart on the table.

"Yo, it's still hot.

You're very careful, and you know how to heat it up before you take it out.

But with this little trick, you still can't fool the old man. Whether it's something that has just been created, the old man only needs to glance at it, and he can ......"

Ding Sanshi's face stiffened in vain, and countless unbelievable lights erupted from his eyes.

"No way, it's absolutely impossible! How could this cast iron core have just been forged? And...... It's so perfect. ”

Looking at Ding Sanshi, with a shocked look on his face, Sun Fan immediately smiled, "Old Ding, the facts are right in front of you, do you have anything else to say?" Refining such a thing requires not only experience, but also talent. ”

Hearing this, Ding Sanshi first looked at the cast iron heart in his hand, then at Sun Fan who was sitting next to him, and finally shook his head and sighed, "Sure enough, it is a hero from ancient times, and the old man admits defeat." ”

As soon as Ding Sanshi surrendered, he immediately changed from Ding Lao to Lao Ding.

However, Ding Sanshi, the old Ding, is not in vain.

As Sun Fan's foothold in the outer gate and the first force he has attracted to it, the benefits of the Qiwang Mansion are also quite rich. In addition to the funds, pills, and the promise of exercises, there is also what Ding Sanshi wants to know in his dreams - the method of refining the heart.

It is said that it is a refining method of the heart, but in fact, it is not true.

Sun Fan just told Ding Sanshi in detail about the condensation process of the cast iron heart, according to his observations.

Whether this is useful or not, and what it can ultimately learn from it, is unknown...