Zhong Yihan studied here for three days.

He basically read the well-preserved books in the library, and then began to deduce the format.

After that, he spent another two days in various front lines on the mountain, observing and observing in person. If he did not understand, he would go to the old man to ask.

A total of five days, Zhong Yihan finally mastered the trick of protective mountain formation.

Even his understanding of this protective mountain formation is much better than that of the old man.

“Here, can't use red blood crystal, want to use blood moon fairy ice. The energy provided by red blood crystals is not good enough to support the whole formation. ”

the old man said: “But we don't have blood moon fairy ice!”

“Yes, it can be extracted and refined twice through red blood crystal. It is written in the book.”

the old man clapped their heads and said, “It is true that you have done the same research on the formation, I admire you!”

“It's not that I have any research, it's all written in books, but you didn't pay attention?”

the old man wryly said, “In fact, I prefer Kung Fu, reading is boring.”

Zhong Yihan smiled and did not speak, but continued to work with the old man to repair the entire formation.

the old man is not very proficient in the format, five days have not been able to complete the formation repair, but with the help of Zhong Yihan, repair the formation progress immediately much faster.

And in the dark, there are a pair of eyes staring at the two people, eyes flashed a fierce.

After another two days, the formation had a total of 28 front lines, basically have finished recuperation, leaving only the last one.

“No, no! You can't use essence gold here, you have to use non-trace gold. ”

“But there is really no such thing as non-trace gold, and only essence gold can be used.”

“If you don't find a way to find it, buy it.” Zhong Yihan's att.i.tude was very obstinate. “In short, you can't use essence gold. Otherwise, a huge flaw will be formed, leading to the incompleteness of the formation.”

the old man sighed, “How do I not know? However, non-trace gold has always been extremely precious. It is simply beyond the reach of a small sect such as us to buy. The essence gold was used by the former formation. ”

“So your former formation was breached.” With a straight face, Zhong Yihan said, “I was still surprised that there should be at least ten or more barbarian of level 3 in order to break through with brute force. However, I have never seen barbarian of level 3 here, and some of the highest ones are only level 2.”

“Then how was this formation broken? It is because there are loopholes here! The formation is unstable, just like the foundation for building a house is unstable. It's strange not to have an accident! ”

the old man said, “Do we really need non-trace gold?”

“That's for sure. Otherwise, if something happens next time, do you still expect me to save you?”

The old man frowned and pondered for a long time before sighing and saying, “let it be, I'll fly the pigeon to pa.s.s on the book to other sects, hoping to borrow a non-trace gold. Well, I'm afraid we have to pay a huge price! ”

Zhong Yihan quipped: “What price can be more important than life? Life is all gone, and the Eight Gates almost died. What price are you still worrying about? ”

“Well,” the old man face shame, “you are right, I'll go to write books. Only, after having non-trace gold, is it sure that the formation will be complete? ”

“Yes.” Zhong Yihan nods, “with the non-trace gold, this formation is complete, but the extent to which it can cover depends on the size of non-trace gold. However, even if it is small enough, it will not be a problem to protect the two mountains. It will be enough for you to rise up again. ”

“Well, I'd like to thank you first. I'll go to the flying pigeon to pa.s.s on the book, but we have to wait for one day at the earliest.”

Zhong Yihan said with indifference: “then wait. it took me a few days anyway, and I didn't care to wait another day. I haven't finished reading the books in the library, so I just went back to read them.”

After a pause, Zhong Yihan said: “However, you should pay attention to the fact that before non-trace-gold arrives, you must hold on to this key front and don't be destroyed, otherwise everything we have done before will be wasted.”

“yes, I'll send someone to guard this place, but it's only one night and I think it'll be fine.”

Zhong Yihan nodded. The barbarian has not appeared in recent days. there should be no barbarian coming back in a short time. It should be safe for the time being.

After the explanation, Zhong Yihan went back to the library to continue reading, while the old man went back to write the letter and borrowed non-trace gold from other sects.

At night.

A figure stealthily came to this place.

The shadow was very cautious. Before coming, he made a special trip to the library and the bedroom of the old man. He found Zhong Yihan still reading in it. After the old man had slept, he came to the key front.

The black shadow looked at the key place that had not yet been covered up. There was a trace of fierce crime in his eyes. Then he raised his hammer and smashed it hard.

“dong!”

A loud noise, black shadow miserably shout a voice, the whole people were flying.

Shadow frightened, know himself exposed, hurriedly want to escape!

But at this moment, several figures appeared in front of him and stopped him.

The leaders were the old man and Zhong Yihan.

In the firelight, the shadow's face was reflected.

It was Zhang Qiming, the former disciple of the outer gate who showed some panic.

“I wonder that the leader is dead, the elder is dead, and the inner disciple is dead. It happened that you, the outer disciple, are not dead. I thought you were hiding in the back for fear of death, but I didn't think you were a traitor in the door! ”

The narrow-eyed man also said: “You took the initiative to eat the flying horse before, in order to annoy him. If you could leave, it would be best, because barbarian will only kill us, not you, right?”

the old man also said, “The former formation was broken. Should there be some reason for you to get in the way? However, you can't imagine that his talent for the formation is extremely high. in fact, yesterday, he completely repaired the formation! And we deliberately act, is to lead you out! ”

Zhong Yihan holds a small formation plate in his hand. This plate was made by himself. When he puts his spirit into it, he can see the position of everyone on the mountain and their approximate actions.

And he saw, this Zhang Qiming has been quietly followed himself, immediately gave birth to suspicion.

Is he a “hidden mission”?!

No wonder everyone else did not get high marks, the highest one only got 76 points.

It seems that in order to solve this task perfectly, it is necessary to completely repair the formation, and then he can find something wrong with Zhang Qiming, triggering the hidden task of finding traitors!

Now, everything is clear.

Zhang Qiming knew that he was completely exposed and that no matter how eloquent he was, he could not say that he was innocent.

As a result, he immediately gave a loud roar, many scales immediately appeared on his body, and his neck grew longer, just like the first two barbarians that Zhong Yihan had solved before.

However, with his transformation, his strength is only the primary level of junior Kung Fu fighter.

the old man and others have recovered their fighting power at the moment, and there is no need for Zhong Yihan to shoot. This guy was cut to pieces by the crowd.

[The task is over and is being calculated …]