Xia Yu's promotion to the third grade was completed in no more than seven days.

In less than seven days, from the first bone to the first one, it is now one hundred and eighty.

This is no longer a matter of extremely fast bone quenching, in a popular saying, this is called - the bone quenching speed is terrifying!

You must know that even for an ordinary B-rank genius, it will take half a year to start from the first bone to the one hundred and eighty bones.

If you can complete this progress in three months, you have to beat gongs and drums to celebrate for three days.

But how long did Xia Yu take? less than a week!

Fast, too fast, but why so fast!

Xia Yu himself was confused.

After pondering for a long time, Xia Yu finally came up with a clue.

The so-called bone quenching is a process of polishing bones with spiritual power.

It's a bit like the process of the river polishing the pebbles.

Bones are the stones in the river, and spiritual power is the flowing water.

The larger the river and the faster the flow rate, the better the effect of scouring and polishing.

Ordinary people only have more than ten meridians, while Xia Yu has twenty meridians, so there is a big difference in terms of the amount of spiritual power.

The meridians of the others are divergent, and although they flow around the source of the Dao, they have a single route and a slower speed.

Xia Yu's meridians had already formed a closed large circle, and all twenty meridians were connected, flowing extremely fast under the urging of Dao Yuan.

There is also the Daguan knife in his hand.

Xia Yu slashed the monster with the big knife in his hand and absorbed the monster's spiritual power, which was equivalent to increasing the entrance of the water source.

Xia Yu redistributed the absorbed spiritual power to other martial artists, which was equivalent to widening the outlet of the water source.

If the process of refining the bones of others is infiltrating little by little, the process of Xia Yu refining the bones is mighty and indomitable.

In addition, A-level talents have advantages in different aspects, so there is a terrifying record of one hundred and eighty yuan in less than a week.

Xia Yu looked at the Daguan knife in his hand, this was the first contributor to the extremely fast bone quenching this time.

If there was no big knife to continuously absorb spiritual power, relying solely on Xia Yu's own spiritual power to quench his bones, this time would have been extended by at least three times.

And it's not that if you lend someone a broadsword, someone else will be able to use it.

Because the absorbed spiritual power has to find a way to quickly distribute it.

If there is only a spiritual power entrance and no spiritual power exit, the explosion may be the only result.

Perhaps, only Song Mengfei, who has the same wood attributes, can copy this model of her own.

But the effect is certainly not as good as itself.

And it is not an easy task to let Song Mengfei wield a big knife of nearly 10,000 catties to slash the demon.

Besides, in addition to the special situation of demon beasts attacking the city, let so many demon beasts be found there to cut?

No, I'll have to find a way to find out where there are any monsters that haven't surrendered.

Since there is this shortcut, then go all the way to the end, and strive to complete the refining of all the bones in the body.

Thinking of this, Xia Yu stood up again.

"Where are you going?" asked Song Mengfei and Tang Ziyi.

"I'm going to kill the demon, you two are tired, so don't go. ”

Xia Yu said to Tang Ziyi and Song Mengfei.

"Reinforcements have arrived, and most of the evil demon beasts have been killed, you don't have to worry about killing demons!"

Song Mengfei persuaded.

"You two go into the city, go and protect those ordinary people, there were a large number of wild beasts entering the residential area before, although these beasts are not as dangerous as demon beasts, but they are also dangerous to ordinary people, you go and help." ”

Concubine Song Meng and Tang Ziyi knew that Xia Yu had already made up their minds, so they didn't persuade them anymore.

The two didn't even propose to slay the demon together, because compared to Xia Yu, the strength of both of them has become a burden.

This has been confirmed from the monster siege that just ended.

Xia Yu carried the Daguan knife and headed towards the north, and the more poor and remote the countryside, the more carefully he had to explore.

After the monsters besieging the city were dispersed, in addition to those who were killed and subdued, a small number of them burrowed into the mountains and forests and did not dare to come out.

Sooner or later, these monsters are hidden dangers, and they can be regarded as Xia Yu's experience points. ’

After another two days, Xia Yu killed eleven third-grade demon beasts in a row.

In order to ensure the balance between the supply and demand of spiritual power, after killing demon beasts and plundering the other party's spiritual power, he blessed these excess spiritual powers on the surrounding beasts, and as a result, he also prompted a large number of beasts to demonize.

Of course, there are also many beasts that explode because they can't withstand these abrupt spiritual powers.

In less than two days, Xia Yu's bones were tempered to two hundred and five, and he was only one step away from the last two hundred and six bones.

Xia Yu has read relevant popular articles from the software of the Awakening Era.

There are a total of 206 bones in the human body, but as long as 180 of them are tempered, they can be promoted to the fourth grade, and the remaining 26 pieces are not necessary for the third grade to be promoted to the fourth grade.

In fact, the vast majority of martial artists will choose to advance after refining one hundred and eighty pieces.

If someone wants to pursue perfection, they can do that, but after one hundred and eighty bones, the remaining bones are extremely difficult to quench, and the further they go, the more difficult it becomes, and almost no one can quench all two hundred and six pieces.

The position of the last bone is not fixed, the only thing that is fixed is...... The difficulty factor is hellish.

Xia Yu's last bone is in the rib cage position, which is indeed a bit difficult...... If the difficulty is a thousand times greater, maybe Xia Yu won't be able to break through in a short time.

Fortunately, the difficulty did not increase by a thousand times, so after a day of hard work and humming, Xia Yu finally completed the quenching of the last bone!

All the bones are quenched for two hundred and six pieces, and the quenching time is within ten days, if this result is spread, everyone has to say - Ya's horse urine drank too much, right?

If you are overheated, you may be caught and slapped wildly.

This can't be blamed on others for not believing it, but it's too unbelievable, it's not a matter of breaking the record of the Qingzhou region, this is throwing the national record on the ground and trampling on it three hundred feet.

Xia Yu finished quenching his bones and was thinking about whether to advance, when someone came.

This is a middle-aged man who looks a little rich, with a round face and a smile, like the landlord of the house next door.

But Xia Yuhe didn't dare to treat him as a landlord and old wealth, the key was that the clothes on his body were too eye-catching.

The instructor uniform of Qingzhou Excavator Vocational College, and there is a golden bowl-sized excavator embroidered on the chest.

These days, I often deal with Qingzhou Excavator Vocational College, Xia Yu knows that ordinary tutors can only embroider excavators on cuffs, and those who are qualified to embroider this thing on their chests must be the leadership of the college.

This guy is the dean or vice president of Qingzhou Excavator Vocational College......

"My name is Yuan Tong, and I am the vice president of Qingzhou Excavator Vocational College. ”

Yuan Tong touched his chin and looked at Xia Yu with a smile.

Well, this guy is very energetic, has a good temperament, and his strength is so-so, he is in the late stage of the third grade, no wonder he can become Tang Ziyi's boyfriend!

If you count it like this, it's not a flower plugged in cow dung!

"Hello Dean. Xia Yu said hello, and then planned to go around.

The deans of the people are all big people, and there must be important people here, so small people like me should not delay their precious time.

"Don't run, boy, I'm here for you. ”

Principal Yuan stopped in front of Xia Yu like a robber.

"What are you looking for me, what are you looking for me, do we know each other?"

Xia Yu looked at Principal Yuan with a curious expression.

Don't say it, there are only three vice presidents of Qingzhou Excavator Vocational College, namely Tang Mo, Song Fei and Yuantong, and Xia Yu has seen all three of them.

"Let me ask you, is your kid an A-level talent?" Principal Yuan asked, looking at Xia Yu.

"Yes and what? What if not?" Xia Yu replied with a squint at Principal Yuan.

"Of course it's different, if you are an A-level talent, the state will send you a professional tutor to provide you with excellent exercises and a huge amount of cultivation resources.

In a word, ask for money to give money to people to people.

If you're not an A-level talent, then I'll say it for nothing. ”

Principal Yuan explained.

"In that case, then I'm in a showdown, I'm an A-level talent, and I won't pretend. Xia Yu said seriously.

Looking at Xia Yu's scoundrel appearance, Yuan Tong suddenly burst into laughter.

It was the first time in so many years that he had seen someone make such a joke about his qualifications.

"You kid said that he is an A-level qualification, what proof do you have? Needless to say, Jiuyang Burning Heaven Gong and the like, I heard that your kid has taken a large amount of Lieyang Pill, maybe there is a residual medicinal effect in his body, and the proof of Jiuyang Burning Heaven Gong is not enough. ”

Yuan Tong stared at Xia Yu with his eyes, "I also said that I am an A-level qualification, isn't this thing just a casual thing?

"It's so easy, you take out the kit and I'll measure it. Xia Yu stretched out his hand and looked at Principal Yuan and said.

"Aren't you talking nonsense? If there was a kit, I would have used it a long time ago, and I still need to talk nonsense with you?"

Principal Yuan's eyes widened: "B-level and below talents can be directly measured, but A-level is not, the error rate of the reagent is too high, and it is generally determined by the expert group in combination with the daily performance of the martial artist!"

"Then you should go to the expert group. Xia Yu said seriously.

Principal Yuan smiled and didn't speak.

Looking for an expert group? Doesn't finding an expert group mean that the whole country knows that you are A? How can we rob people?

"I'm the most authoritative member of the expert group, okay, let me ask you, how long do you have to quench your bones?" asked Principal Yuan.

Xia Yu was stunned for a moment, Principal Yuan wanted to speculate on his qualifications through his quenching speed.

There are 206 bones in the body, and Xia Yu took ten days to quench them, with an average of 20.6 pieces per day.

There are twelve hours in a day, which is basically two bones per hour.

Principal Yuan asked how long it takes to temper a bone, so it's half an hour?!

Half an hour is 0.5 hours, thinking of this, Xia Yu stretched out his hands, one hand gestured in a circle, and the other hand stretched out five fingers.

Well 0.5, no problem!

Principal Yuan frowned, "50 hours? This speed is already a bit slow, at most it is a B-level qualification." ”

"Ahem, you misunderstood, what I meant was half an hour. Xia Yu said very seriously.

"Isn't that nonsense for you kid? There is also a limit to bragging, if you can temper a bone in half an hour, I will run naked on campus. ”

Principal Yuan smiled dumbly, half an hour?What are you kidding, do you really think that we are all wine bags and rice bags?

"What I said is true!" Xia Yu said very seriously.

"I believe you are a big-headed ghost, Tang Ziyi was deceived by your rhetoric, right?!" Principal Yuan teased, "Come on, prove it to me, how many bones have you refined now? ”

"I'm sorry, I can't come. Xia Yu said innocently.

"You can't come, you kid have a weak heart, right?" Principal Yuan felt that he had exposed Xia Yu's tricks.

"It's not that my heart is weak, but my bones are already full, and you're too late, so I can't prove the time with refining my bones. Xia Yu said seriously.

Don't tell me that you have tempered 206 bones, this is impossible, because the last bone is basically impossible to temper, and even a genius like me is immune. ”

Principal Yuan said confidently.

What are you kidding, in the huge Qingzhou region, I haven't heard of anyone who has finished refining all the bones of the whole body when he is in the third grade, and the Hades King, the most bullish among the nine of us, may not have this opportunity.

In the third-grade stage, the difficulty of refining all the bones is the same as the difficulty of opening up twenty meridians in the second-grade stage, and they all only exist in legends.

"I don't know if you can avoid vulgarity, but I'm sure I'm full.

I still know how to count, and my math is not taught by my PE teacher, and my math teacher doesn't die early. Xia Yu said seriously.

"Boy, quenching bones is different from others, it is difficult to judge how many bones have been tempered by breath outside, the most authoritative way is to touch it with your hands, do you dare to let me touch it?" Principal Yuan asked seriously.

Xia Yu thought about it and nodded seriously, "Ahem, may I ask, is he serious about touching this thing you said?"

"Bastard boy, where do you want to go? My character is well-known and strong in school, how can I be so dirty? If I am not good character, how can I be the principal?"

Principal Yuan was almost so angry that he vomited blood.

"It's hard to say, how many principals have a special hobby, how do I know if you're serious?"

"Bastard boy, do you want to get beaten, do you? Believe it or not, I'm going to beat you?!"

"Well, I'm temporarily convinced of your character. ”

Xia Yu made a final statement for his trust in Principal Yuan.

"Don't worry, I will prove my innocence with my own practical actions. Principal Yuan said very righteously.

And so, the testing began.

In the first stage, it is normal for the upper limb bones to be detected.

In the second stage, the sternum is tested, which is normal.

The third stage, lower limb bone detection, is very positive...... Damn, wait, where do you touch it?