The refining device is different from the alchemy, the melting temperature of various mineral materials is much higher than that of medicinal materials, and the degree of solidification and fusion is also very difficult to control.

And this makes it difficult for a strong refiner to grasp the quality of the weapon, and most of the time it can only rely on luck.

But if there are catalytic materials, it will be quite easy to melt and melt.

Catalytic materials can make various mineral materials melt faster and more thoroughly, and when melting, people can also control the material ratio more accurately, greatly improving the success rate and blade quality!

Among all kinds of catalytic materials, metallurgical sand is an excellent one, and the best metallurgical sand is the best of the best!

"If you get a top-grade metallurgical sand, then it will be easier to upgrade the Chixuan Sword, and it will be more able to stabilize the foundation and create a top-grade heavenly soldier!"

There was a fierce light in Su Mu's eyes, this superb metallurgical sand, he had to get it!

"Looks like I can't get rid of it." Su Mu smiled and spoke, took the invitation, and received it in his arms.

The young man nodded with a faint smile and left with his fists clenched.

"Looking forward to your arrival."

"Young Master Chu?"

Gu Feng waited for Su Mu outside Danling Academy all night, and instead of seeing Su Mu come out, he saw the young man first, and the moment he saw the young man, Gu Feng was stunned, and couldn't help but glance inside.

"Young Master Chu, when did you come?"

He waited at the gate of Danling Academy all night, but he didn't see when the young man entered.

"Gu Feng, this time it's your fate." The young man glanced at Gu Feng lightly and strode away directly.

Big life? Gu Feng shuddered, and hurriedly shouted: "Young Master Chu, please forgive me!" ”

He didn't know when he provoked the young man, but he didn't dare to ask, he could only ask guilt!

What about the hundred-year-old family, they must also bow their heads in front of King Cangzhao!

After the young man left, Gu Feng looked bitter, he suddenly found that his life was so bitter, not to mention that he had provoked Su Mu, and he also inexplicably provoked the grandson of King Cangzhao, isn't this the end?

King Cangzhao has lived for hundreds of years, and although he does not have many children under his knees, it has also been passed down to the third generation.

That young man is the grandson of King Cangzhao - Chu Feiyang!

"What are you doing here?"

Su Mu walked out of the gate of Danling Academy, and when he saw Gu Feng standing there, his face was bitter, and he couldn't help asking.

"Young Master Su." Gu Feng came back to his senses, shook his head with a wry smile, and did not say anything about Chu Feiyang, but took out the invitation.

"I've been waiting for a long time, and I want to invite you to the banquet of the Cangzhao Palace."

It's the banquet of King Cangzhao again? Su Mu raised his eyebrows slightly, and then shook his head.

Not going? Gu Feng's eyes widened, King Cangzhao's banquet, didn't he go? Brains are fine, right? This is a once-in-a-lifetime opportunity, don't you know how to grasp it?

"Master Su, King Cangzhao is ......" Gu Feng thought that Su Mu didn't know who King Cangzhao was, and hurriedly explained.

"No need." Su Mu interrupted him and took out an identical invitation from his arms.

"I already have it."

Seeing the invitation, Gu Feng closed his mouth directly, looked at the two identical invitations in a daze, looked up at Su Mu in disbelief, and asked cautiously, "His Royal Highness the Great Prince gave it to you?" ”

The only thing he could think of was the eldest prince, after all, King Cangzhao's invitation was not something anyone could get.

Even King Cangzhao's invitation was given, and he really didn't guess wrong, the eldest prince's attention to Su Mu had reached an overwhelming level.

"It's not." Su Mu shook his head, and just wanted to explain but found that he didn't even know the name of that person.

No? Gu Feng frowned, why are there so many strange things today.

"Could it be Chu Feiyang?" A flash of inspiration flashed in his mind, Gu Feng's eyes widened, and he was shocked when he looked at Su Mu.

Su Mu was startled when he saw Gu Feng, and a black line couldn't help but pop up on his head, isn't he sick?

"Master Su, is it an invitation that Chu Feiyang sent you?" Gu Feng asked, swallowing his saliva.

"Chu Feiyang? Is that the guy who just got out? Su Mu asked, and Gu Feng nodded.

"It turns out that his name is Chu Feiyang, and that's him.

"Poof!"

Gu Feng's figure took a step back directly, and looked at Su Mu with a shocked face.

"Prince Cangzhao's grandson, he actually sent you an invitation in person!?"

"This treatment ......"

The eldest prince can't enjoy this kind of treatment!

Gu Feng's whole person was already messy, how strong should Su Mu's background be in order to be so favored by King Cangzhao!

Su Mu's surprised eyebrows raised slightly, the grandson of the prince of Cangzhao? No wonder he looked down on him when he was in heaven, with this background, he can indeed look down on the vast majority of people.

"Wait, you don't even know his name or who he is?" Gu Feng's eyes widened again, he didn't even know what identity and name people had, how big his heart was!

And it looks like this, it seems that Chu Feiyang is tying up Su Mu!

"Wait, is what Chu Feiyang said just now because of him?" Gu Feng suddenly remembered Chu Feiyang's warning when he left, and was stunned again!

He was almost certain that Chu Feiyang was currying favor with Su Mu!

And his discomfort all came from Su Mu!

At this moment, Gu Feng couldn't help but be a little lucky, fortunately he begged for mercy in time, otherwise he would definitely die a miserable death!

Su Mu shook his head, didn't explain, and turned around and left directly.

"Hey, wait for me!"

Su Mu walked away before Gu Feng came to his senses and hurriedly chased after him.

"Master Su, do you have a place to go today?"

"None? Then I have a banquet tonight, can I enjoy my face and participate? ”

Su Mu's footsteps were stunned, why is it all a banquet?

"Is it good?" With a change of mind, I didn't refuse directly, anyway, there is nowhere to go now, if it is good, then go for it.

Belch...... Gu Feng looked at Su Mu in amazement, he didn't look like a person who was short of money, why was he so greedy for money.

"There are no prizes for this banquet, but there are a few jars of good wine."

"What good wine?" Good wine is fine, although Su Mu is not a drinker, but he will not refuse good wine that can promote cultivation.

"All of them are 100-year-old, not only fragrant, but also strong enough!"

"The best of them is the fire, a sip of fiery wine in the stomach, the whole body burns, hurts and enjoys!" As he spoke, Gu Feng's saliva flowed out.

The name of the wine is Agni, 300 years old, and it is hard to find!

"Let's go, lead the way!" Su Mu's eyes lit up when he heard this, this kind of good wine, then it must not be missed.

Seeing that Su Mu suddenly became so positive, Gu Feng was stunned for a moment, then shook his head with a smile and chased after him, sure enough, he was a drunkard like him.

"Don't worry, the banquet will start in the evening, or shall we go and be happy first?" Gu Feng caught up with Su Mu and squeezed his eyebrows.

"If you want to go, I'll find a place to settle down first." Su Mu gave Gu Feng a roll of his eyes, he didn't have the heart to do that now, he just wanted to get the best metallurgical sand as soon as possible and upgrade the Chixuan Sword to the best heavenly soldier!

Gu Feng nodded helplessly, so he went to the nearest restaurant to settle down, and after having a meal with Su Mu, he opened a room to rest.

In the room, Su Mu unloaded the baggage, except for the materials for upgrading the Chixuan Sword, everything else was put into the storage bag, leaving only a wooden box.

This wooden box is the third wooden box I got in Heaven!

Su Mu took a deep breath and began to open the wooden box, and in the wooden box, an ancient sheepskin roll came into view.

When I picked up the parchment scroll and opened it, I saw that it was a map, and there was an obvious sword-shaped marker on the map!

"The map of the Ten Thousand Swords Sect's training secret realm!"

Su Mu's hands trembled with excitement when he held the map, this map was the same as the one he got in the Black Wind Village, it was a map for entering the secret realm of the Ten Thousand Swords Sect!

Now that he has two maps in hand, it means that he has booked two advanced swords that are the same as the Chixuan Sword!