C577

Calculus and everyone's lives are related, all walks of life will be used. To build dams, to build ditches, to build bridges, to calculate precisely; to account for taxes, to allocate funds for departments, to calculate precisely; to calculate accurately the military budget and grain for soldiers; to calculate precisely, relatively speaking, not much, but it is not without necessity, for the Ministry of Rites and the Ministry of Justice to calculate precisely.

Not to mention the various departments of the imperial government, even in all walks of life, mathematics was inseparable. From this, one could see the importance of mathematics, but the various countries still did not place any importance on mathematics.

Now that Xu Zicheng had asked, Ji Yunkai actually wanted to have a good chat with Xu Zicheng, the role of arithmetic in the military, but …

Although as soldiers, they would obey orders, there was still a difference between following orders and going all out.

With Ji Yunkai doing this, even if Xu Zicheng wouldn't risk his life to help Ji Yunkai, he would still do things seriously. He didn't have to do it because of Liu Yuan's orders.

"Rest assured General Xu, I will not hide anything." Ji Yunkai was not one of those famous families. She would not treat what she had learned as a personal property, she had received an education that allowed her to teach everything he had learned without reservation to others, and he would not worry about others learning what she had learned, and he would not be stepped on.

"Let's go, shall we?" With Ji Yunkai's consent, Xu Zicheng didn't delay any longer.

He needed to finish things as soon as possible so he could let Ji Yunkai talk about the calculation.

"Alright." Ji Yunkai did not know whether the Demonic Sect had made their move or not, so going early would definitely be for the best.

"I'll go back first. You can take care of this." From the beginning till the end, Xiao Jiu'an did not interfere with Ji Yunkai's decision. Seeing that Ji Yunkai had succeeded in making Xu Zicheng willing to work for her, Xiao Jiu'an left without worry.

After all, it was better to be willing to do things than to only listen to orders.

Other than the troops and horses of Xu Zian, there were also hidden guards protecting Ji Yunkai. He did not need to worry about Ji Yunkai's safety.

"Alright, I will be careful." Inside the camp, Ji Yunkai felt a sense of security, and was not worried that there would be any accidents.

Seeing that Xiao Jiu'an wanted to leave, Xu Zicheng did not urge him to stay. Although General Liu did not say anything and only told him to bring troops here, but Revelation's Prince Yanbei was still at Black Rock Mountain, so he could more or less guess it, it's just that …

As a subordinate, even if he had guessed some things, he wouldn't be able to say a single word more.

Xiao Jiu'an returned on the same path as before, and went back to the small villa from the secret path. Of the people in the manor, other than Xiao Jiu'an's trusted aides, no one knew that he had left midway.

Outside the manor, the members of the Demon Sect were still surrounding the manor. During the time that Xiao Jiu'an was gone, they had launched an attack once, but unfortunately, their first attack had ended in failure.

Although there were not many people in the manor, every single one of them were skilled, and the people that Mo Qi Xi had arranged were not weak. With an expert like Li Yuan, it would not be easy for the people from the Demon Sect to charge in.

Once Xiao Jiu'an returned, she reported the situation outside to him, "Ninth Elder, the situation outside is extremely bad for us. After the first wave of the demonic sect's attack failed, they sent additional people, and all of them were experts."

The three hundred followers that surrounded the manor were just ordinary thugs, the main force of the Demon Sect were the Chief Protector and a few others. After fighting with Xiao Jiu'an's people, the Chief Protector decisively transferred another group of experts from the sect.

Right now, there were more than twenty experts by the head protector's side, their strengths were all above the Seven Scions of the Demon Sect, which showed how much the Demon Sect valued Xiao Jiu'an.

"Let Li Yuan continue to drag it out." It would only be fine if Ji Yunkai brought the troops and horses over.

With the five thousand soldiers and horses under Xu Zicheng's command, regardless of whether they were ordinary disciples of the sect or great protector of the Devil Sect, everyone could only become a prisoner.

"Yes, Ninth Master." With Xiao Jiu'an taking charge, the guards felt relieved.

No matter what happened, as long as their prince was around, they wouldn't be afraid.

Outside, Li Yuan stood at the entrance of the manor, confronting the head protector of the Demon Sect. The people from the Demon Sect did not move, Li Yuan did not move as well.

"Chief enforcer, it's not good for us to continue this stalemate." When the people from the Demon Sect saw that the people at the manor were surrounded by them, they did not panic at all. Instead, their hearts were pounding, and they felt that the Prince Yanbei had some tricks up his sleeve.

"I know that delaying is not good for us, but who among you can be Li Yuan's opponent?" The chief protector of the Devil Sect glared at the person beside him with a gloomy face.

The man's face turned pale as he said dutifully, "Chief Protector, why don't we attack together? No matter how strong Li Yuan is, he is only one person, with so many of us, even if we use up our energy, we can't kill him off. "

"Together?" The chief protector of the Devil Sect sneered.

This was a good idea. Li Yuan's reputation was too big, and she had enmity with the Demon Sect, so no one dared to face him alone. If everyone fought him together, then they would have nothing to say.

"Fine, let's attack together. No matter what, we must break through the defense line today and capture the Prince Yanbei." As long as the Prince Yanbei landed in their hands, a mere Li Yuan was not worth mentioning.

The head protector of the Demon Sect ordered, other than the two great clan elders and a few old men, the rest of the people followed him to attack Li Yuan. With the head protector taking the lead, no one else had any objections.

"Kill him!" The chief protector of the Devil Sect took the lead with more than ten experts following behind him.

Seeing this group of people rushing over, Li Yuan was not worried at all. Instead, she was excited: "You came at the right time, this old man was just thinking of slaughtering you all one by one."

If it wasn't for Prince Yanbei's orders to delay things as long as possible and not fight with the people from the Devil Sect, he would have killed all of the people from the Devil Sect long ago …

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