The Demon Abyss, where the Demon Race was born.

In the battle of the evil 50,000 years ago, the two sides of the immortals and demons joined forces to resist the enemy under the leadership of the Asgard Demon Palace, and finally destroyed the evil race.

Then, Mu Xiaoxian, the ancestor of the Immortal Gate, and Mo Rongtian, the eldest disciple of the Demon Palace, devoted their cultivation to create the artifact "Twin Wrist Lock" for mana, and Ling Xiaoai, the daughter of the immortal lord of the Immortal Palace, and Mo Yunsheng, the prince of the Demon Palace, took the initiative to sacrifice and voluntarily turned into lock spirits.

With this artifact, the evil qi on the Aoba Continent was swept away, almost cutting off the possibility of the resurrection of the evil race.

But as Yun Miaoxian said, although the current Aoba Continent seems to be thriving, under the prosperity, chaos is everywhere.

The rebel sect is constantly making trouble, the demon world is ready to move, and the evil cultivators are inexhaustible... What's more, in the face of the huge pressure in reality, countless ordinary people have gradually become disillusioned with life and have extremely strong negative emotions.

All of this has turned into a new evil spirit, a new evil race has been born, and the abyss of evil demons has been reopened.

In order to prevent the evil clan from rebelling, the Aoba official used the ancient artifact "Twin Wrist Lock" as the eye of the array, and searched for eighty-one barely intact sealing evil foundation stones from all over Aoba, and once again laid a large array of sealing evil at the exit of the demon abyss.

At the same time, Aoba Takeaway, the major immortal cultivation families, sects, and demon sects have all sent a large number of advanced cultivators to station beside the abyss, just in case.

It's just that the two immortals and demons have a grudge for thousands of years, and there are often some small frictions.

"Mr. Li can rest assured that the twin wrist locks are intact, and the major forces are still stable." "However, the evil clan suddenly rushed out that night, and the war broke out in a hurry, so during the fight, the wise master accidentally hit a cornerstone of sealing the evil... Mr. Li, don't worry, the big array has not been broken, and the damage to the foundation stone of sealing evil is not serious, but a fragment was knocked down, and it was involved in the spatial crack caused by the battle, and I don't know where it flew to..."

Li Shuangshuang and the others breathed a sigh of relief.

It turned out that it was just a piece of debris, which was okay and didn't have much impact.

However, this matter cannot be completely ignored, after all, the foundation stone of sealing evil is also an ancient treasure, even if it is a fragment, if it is obtained by ordinary people, it will definitely have an impact.

"Well, I know about this, and I'll report it to the general manager later." After finishing speaking, Li Shuangshuang's face suddenly turned grim, he pulled out his sword with a bang, pointed at the rolling evil qi in the demon abyss, and said coldly, "Colleagues, I am going to go down to the abyss to kill a few evil clans and dispel this evil qi some, but is anyone willing to go with me?" ”

Everyone was stunned, and then Liu Ze took the lead in reacting and stepped forward.

Wang Xiaofang, who was holding the square sword, hesitated for a moment, and then was about to take a step forward, but was held by the admonition and anger.

While dragging Wang Xiaofang, he looked at Li Shuangshuang, who was awe-inspiring, and said solemnly: "Amitabha! Mr. Li, if you want to go down to punish the evil, the old man will not stop him, but Mr. Wang must stay on it with the old man to guard, just in case. Also, this abyss is full of evil spirits, and you can't see the truth clearly, Mr. Li must not go too deep, safety is the most important. ”

Li Shuangshuang nodded, then turned around to face the abyss, and jumped without hesitation, and the cold ice true qi around her body burst out, falling straight down like a brilliant meteor.

The major families and the Demon Gate were all shocked by their decisiveness, and in an instant, several hot-blooded monks followed closely and entered the evil abyss.

On that day, there were a total of 17 people who jumped off the cliff in the Aoba Continent to punish evil spirits, and only 12 people returned after half a day, but they killed hundreds of evil clans and seven evil generals!

It's a big win!

The scarlet evil aura in the demon abyss also faded and subsided, and it ceased to churn.

Hiding behind Yun Miaoxian before, Li Shuangshuang, who was inconspicuous, exerted his might in the evil abyss, and beheaded three evil generals in a row, shocking the Quartet.

People gave the nickname "Ice Sword".

......

Of course, Lu Ningan didn't know that there was such an earth-shattering battle of evil thousands of miles away, and that afternoon, he had been cultivating a master-apprentice relationship with Chang Xiaodan.

"Xiao Dan, can you tell Master about any of your hobbies?"

Chang Xiaodan replied boredly lying on the desk: "I like to hear others call me grandma." ”

"Your hobby... It's quite chic. Lu Ningan was choked for a moment and continued, "Then let's do it, you have been studying the 'Taoism class' by yourself for a while just now, so why don't you take a look at mathematics next?" If there's anything you don't know about your homework, I can tell you. ”

"Okay." Chang Xiaodan reluctantly pulled out a math workbook and said, "I don't know the first question on the second page." ”

Lu Ningan took the workbook and took a look, only to see that the questions were as follows:

The circumference of the rectangle is 30 centimeters and the length is 10 centimeters, how many centimeters is the width?

"It's easy!" Lu Ningan took out a piece of straw paper and made a formula.

（30-10*2）÷2=5

"Look, isn't this coming out!" Lu Ningan handed the straw paper to Chang Xiaodan and said, "Subtract two lengths from the circumference, and divide by two to be wide." Simple, right? ”

Chang Xiaodan's eyes lit up, and he quickly copied the answer to the exercise book, then raised his head and continued to ask, "What about the second question?" ”

Lu Ningan took the workbook again and looked at it, only to see that the topic was as follows:

The circumference of the rectangle is 30 cm and the width is 5 cm, how long is it?

Lu Ning'an: "......"

Chang Xiaodan took the pen and prepared to copy the answer, and at the same time urged: "Master, why don't you talk about it?" Wouldn't you? ”

Lu Ningan slapped the table and involuntarily raised his voice: "How could I not?" Isn't this question the same as the one just now? ”

"It's different!" Chang Xiaodan said innocently, "One is to make the calculation wide, and the other is to make the calculation long, how can it be the same?" Master, are you old and confused? ”

Elder Honsha confused?

Lu Ningan forcibly suppressed his anger and said as calmly as possible: "Xiao Dan, you see, the rectangle is composed of length and width, as long as you know how to calculate width, you will also know how to calculate length." ”

"But..."Chang Xiaodan frowned and said, "Why does it have to be long here and wide there?" Isn't it okay for me to call the longer side wide and the other side long? ”

"No, you can't!" Lu Ningan shouted, "This side is long, and this side is wide!" ”

"And what if I turn the book around?" Chang Xiaodan rotated the exercise book ninety degrees and asked, "Does that mean that this side can be called long, and this side can be called wide?" ”

Lu Ning'an: "...... No! It's called long over there! The shorter one is called wide! You remember it on it! Don't ask me why! ”

"Okay then, Master, what you say is what it is." Chang Xiaodan asked again, "Then Master, can you help me look at the third question again." ”

Lu Ningan took the workbook and took a look, and the third question is as follows:

The length of the rectangle is 10 cm and the width is 5 cm, how many cm is the circumference?

Lu Ningan: !!