For several days, Qian Chao kept himself in his small courtyard and never left.

From the room to his small courtyard, from his bed to the stone table in the courtyard, almost everywhere was a mess, full of papers and books.

I can't count how many pieces of paper full of words and paintings are spread on his bookcase, and there are many papers that seem to be Qian Chao thinking about something, and when he can't think about it, he is simply crumpled into a ball and thrown at his feet, all kinds of books he got from the library building, sent by others or obtained from the outside are also placed on the bookcase randomly, and the bookcase cannot be placed, so it is placed on the bed, and the important chapters in the book are also bookmarked and sandwiched in the book by him with unused yellow rune paper, so that he can consult it at any time.

A white wall on the side of his bookcase was pasted with a big white paper by Qian Chao, and that paper was full of all kinds of runes, these runes were all the runes that Qian Chao had collected so far, not only the six most basic runes such as "running wolf", "Ruyi", and "flying bird" that he commonly used when he first entered the sect to practice alchemy, but also the runes obtained when refining the lock spirit pile for Luo Ying, the runes obtained from the formations found outside the sect, and the rune-like texture on the hard wings of the demon beast named Penarmor Tapir, The runes found in the books of the Jiuxuan Library, and of course the various runes recorded in Yu Xuan's book "The Secret of the Tattoo", were densely written all over the entire paper, and there were more than two hundred.

Qian Chao stood in front of this piece of paper with a pen and pondered, letting the ink drip from the tip of the pen little by little, and after a long time, he raised his hand and added a few runes to the paper, and at this time all the runes he knew were on this paper, and Qian Chao fell into contemplation again.

With Qian Chao's blue eye technique, it is not difficult for him to find a formation that has long been annihilated in the desolate place outside the sect for an unknown period of time, no matter whether those formations are still effective or not, the runes that have survived in the formation are naturally recorded by him, or he finds that the texture similar to runes is found on a demon beast like the pencarapace tapir, he has always suspected that it is also a rune, otherwise it will not make the hard wings of the pentographer stronger than his big shield.

It is not too rare for Qian Chao to get an unknown rune, but even if an unknown rune is obtained, it is still an unknown rune.

This piece of paper on the wall, the full of runes, at least sixty percent out of ten, Qian Chao doesn't know what to use, if he can use these runes handy, it should be a different scene.

How to know what the function of those unknown runes is the problem that Qian Chao wants to solve the most now, at this time, rather than learning some new runes from books, Qian Chao now wants to know if there is any way for him to understand the usefulness of those unknown runes on his own.

If there is such a method, even those runes obtained from the formation may be able to be used in refining weapons, after all, there are three branches of rune science: runes, formations and refining tools, and the runes used are in the same vein.

Carrying the pen, Qian Chao fell into deep thought again.

When he felt everything outside his body again, twilight had fallen in his small courtyard, but Qian Chao didn't care about this, he raised his pen to write something on that paper, only to find that the ink on the tip of the pen had already dried up, and the same was true for the residual ink in the inkstone, he had to pour out some herbal tea from the teapot, grind the ink in the inkstone for a while, and then dip the ink pen and sketch it on the paper.

The night passed.

On the stone table in the small courtyard, both the spread paper and the stacked books were wet with the morning dew.

And Qian Chao was still staring at the paper on the wall at this time.

The paper has been drawn by him or circles or dots or lines, it seems that there are countless ideas that have come out of this night of money, he also used a thin pen to make a lot of notes next to some runes, even a piece of paper is not enough, on the wall next to the paper and he pasted a lot of paper, also full of words, and also used a pen to connect a line directly to a certain rune on the big paper with a circle, even the white wall also left a lot of ink.

……

A few days later, Qixia Mountain.

In the room, he heard someone knocking on his courtyard door, and Yan Xuan walked out of the room.

When he opened the door, Yan Xuan found that it was Qian Chao who was standing in front of the door, but Qian Chao was a little embarrassed at this time, his eyes seemed to be full of bloodshot because he had not rested for a long time, and his hair also looked a little messy, and he seemed to have not combed it for a while, and even the robe on his body had a lot of folds, which was very different from the image of the Qian brothers, who were neatly dressed and polite on weekdays, which made Yan Xuan a little stunned for a while.

"Brother Qian, ...... are you?"

"Sister Yan, I have something I want to ask you for help."

"Okay." Yan Xuan's immediate thought was that this Qian brother might want to tann some kind of monster beast's leather, and ran to him to find some spirit grass to prepare potions.

"Come with me, Brother Qian, the person on duty today in the Spirit Grass Garden should be Senior Brother Meng, you can get more from him." Yan Xuan brought it to the door and prepared to take Qian Chao to the Spirit Grass Garden.

"No, Sister Yan, it's not about using spirit grass, it's ...... Find a secluded place, I have something I want Sister Yan to use your fire knife technique to slash twice. After listening to Yan Xuan's words, Qian Chao knew that Yan Xuan had misunderstood what he meant

"Oh?" Yan Xuan is a little curious, what is this Brother Qian going to do?

Although she was puzzled, it was simple for Qian Chao to do what she did, so Yan Xuan took Qian Chao to the secluded place where she practiced the Fengling Fire Knife every day.

"Wait a minute," Qian Chao said, taking out a small shield from his storage bag, and after a few tricks, the small shield grew to the size that Yan Xuan had seen every day, "Sister Yan, use your fire knife to slash at this shield." ”

"Is this your newly refined shield?" Yan Xuan knew that the big shield of Qian Chao last time he went out had been destroyed, so he asked.

"Yes, but it's a little different from the previous ones, oh, no, this side is still the same as the previous one, Sister Yan, don't keep your hands, just cut it." Qian Chao said.

Hearing that Qian Chao asked her not to keep her hand, Yan Xuan stretched out her right arm when she heard it, and with a "whew", a fire knife several long flames appeared in her hand.

"Then I'm going to behead you."

After speaking, Yan Xuan swung out horizontally.

There was a "bang", and the big shield shook under the fire knife slash.

Then Qian Chao came over to take a closer look.

Although the big shield was not cut open by Yan Xuan's sword, it left a knife mark on it, and the knife mark was still hot and steaming at this time.

"Are you trying to test how strong your shield is?" Yan Xuan also came over to take a look, and at this time she almost guessed what Qian Chao was going to do.

"Well," Qian Chao nodded, pointing to the knife mark, he looked at Yan Xuan, "Sister Yan, can you cut it in this place several times in a row?" ”

"Yes, but won't your shield be ruined then?"

"It's okay, if it's broken, I can reforge it, don't worry, you have a few more knives, I want to see if this shield can withstand a few knives."

"Okay."

After listening to Qian Chao's words, Yan Xuan no longer kept his hand when he swung the knife again, and obeyed Qian Chao's wishes, after Yan Xuan stabbed three times with all his strength, he saw that the shield was cut in half with a "click".

"Four knives." Qian Chao leaned over and looked at the destroyed shield on the ground.

"And then?" Yan Xuan guessed that Qian Chao must have something for him to do.

Sure enough, Qian Chao took out a shield from the storage bag again, this shield looked no different from the shield that was cut just now, Qian Chao arranged the shield, and then said to Yan Xuan: "Sister Yan, this shield is something I figured out with a new method, you give it a try, now cut four knives on it, don't keep your hands, otherwise you won't be able to see if my method is useful." ”

"Hmm," Yan Xuan agreed.

These four knives Yan Xuan really didn't spare his hand at all, they all did their best, and after the four knives, the shield was still there, and the two of them leaned over to look.

"Eh, Brother Qian, your shield is much stronger than the one just now, you see, there is only a shallow knife mark on it." After Yan Xuan saw it, he pointed to a shallow mark on the shield to show Qian Chao.

"Sister Yan, you estimate that if you use your fire knife to cut this shield like just now, it will probably take a few knives to do it."

"It's hard to say, I didn't keep the four knives just now, but I only left such a shallow knife mark on it, if I continued, I could cut it open, but it would take a while to do it."

Hearing this, Qian Chao nodded and said, "Well, it seems that my efforts in the past few days have not been in vain. ”

Yan Xuan listened and asked strangely: "Brother Qian, is it possible that you have been working hard here for the past few days, and you have not had a good rest?" ”

"I squinted for a while when I was tired, and finally got some gains." Qian Chao put away the two shields and said, "Okay, Sister Yan, I'll go first, and I may come back to you in a few days." ”

"Okay."

Watching Qian Chao's figure disappear in the air, Yan Xuan shook his head, this Brother Qian, what is this way to make him excited like this.

……

Mu Xiufeng, purple bamboo forest.

Li Jian was practicing on the edge of the bamboo forest, but he stopped and looked into the air.

"Brother Li."

Qian Chao, who had just come out of Yan Xuan, came to Li Jian again non-stop.

"Brother Qian, why are you ......?"

Li Jian's impression of Qian Chao is similar to that of Yan Xuan, why does this Qian brother look so embarrassed today?

"Brother Li, I came to you to ask you for a favor."

"Oh, that's easy to say." As Li Jian spoke, he saw Qian Chao take out a big shield and arrange it in the open space by the bamboo forest.

"Brother Li, originally I could also use the spirit sword to try it myself, but the power of my spirit sword flying stab is much worse than the power of Brother Li's sword, in order to test how good my shield is, I still have to ask Brother Li to help me try it."

As he spoke, Qian Chao also took out a spirit sword.

"Brother Li, don't use your green bamboo sword, use my one, newly refined."

Li Jian took the sword handed by Qian Chao and looked at it in his hand, this sword was cold, which made Li Jian's eyes narrow, and secretly said that this Qian brother's refining technique seems to be a little more clever, and this sword is much better than what he refined before.

"Brother Qian, this sword is very good, I don't know how to refine weapons, but if you hold this sword in your hand, you can know that it is much better than what you refined before."

"Well, when refining this sword, the runes I used were different from before."

Li Jian nodded, he didn't understand the science of runes, he only knew that this sword was extremely sharp.

Qian Chao said: "Brother Li, you use all your strength to sword that shield. ”

"Good!"

Li Jian said as he spoke, and as soon as he raised his body, he flew forward like a big bird, and then aimed at the shield, and in an incandescent sword light, both people and swords shot over.

With a "ding", the spirit sword pierced through the shield, and the sword seedlings nearly a foot long came out from behind the shield.

"Huh?" Li Jian was puzzled, why was Brother Qian's shield so vulnerable?

Qian Chao also leaned over at this time and took a closer look.

"It's ......"

"It's okay, Brother Li, this shield is still the same as the shield I used before, I have a shield here that is refined with a new method," Qian Chao said and took out a new shield, this shield is not the one that was slashed by Yan Xuan's fire knife before, but a brand new one, Qian Chao arranged this shield and said to Li Jian, "This shield has to ask Brother Li to come to the sword with all his might." ”

"New shield," Li Jian also leaned in front of the new shield and flicked it lightly with his hand, "Okay!" ”

It turned out that Brother Qian not only had to test the sturdiness of the new shield, but also compared the shield he used before.

A sword light flashed by, and there was a "ding" sound, but this time Li Jian's figure jumped back, and the sword was still in his hand, this time the sword in his hand did not pierce the new shield, not only that, but Li Jian also felt that when the spirit sword pierced the big shield, the power of the counterattack was not small, which made him very surprised in his heart, Brother Qian's new shield looked very good.

"Here."

Li Jian pointed with his hand, and on the big shield, the place where the tip of the sword pierced left a shallow sword mark.

"Brother Qian, your shield is much stronger than the one you used before."

"Yes, the hard work of these days has not been in vain." Speaking of this, Qian Chao thought of something again, and said again, "Brother Li, how about you use your green bamboo spirit sword to sword this shield next?" ”

Li Jian had already had this intention, and he also wanted to see how his green bamboo spirit sword compared to the spirit sword newly refined by Qian Chao.

The incandescent sword light flashed, and with a "click", Li Jian's green bamboo spirit sword was stabbed on the shield, and the tip of the sword penetrated, but it was only so, the sword body was tightly bitten by the big shield itself, and it could no longer move forward.

However, in the end, it is still much stronger than Qian Chao's spirit sword, which makes Li Jian still very satisfied.

"Sure enough," Qian Chao looked at the big shield for a while, "Overcome fire, gram gold, but not wood." ”

"Kehuo, Kejin, can't Kemu, Brother Qian, what does this mean?" Li Jian was very curious when she heard this.

"Brother Li, do you remember the pentographer we met in Pipa Ridge?"

The demon beast Li Jian naturally remembered that the hard wings on that guy's body were very strong, and Brother Qian's spiritual weapon, Brother Lu's fist, and Miss Yan's fire knife couldn't hurt it, only his own green bamboo sword could kill it.

Li Jian asked, "Naturally remember, oh...... Come to remember, at that time, you said that there were naturally formed runes on the hard wings of the Pentographer, could it have been used on this shield? ”

"Well, that's right, but this shield is only a half-finished product, I'm ashamed to say it, that Pentoir is born to be able to accommodate different runes on its hard wings, but I can't do it, well, it's a bit eyebrow-raising, but I still have to work hard after I go back, Brother Li, thank you, I'll go back first, maybe I'll come to you in a few days to continue to help."

"Okay."