According to the content on the photo crystal, when the imperial army invaded Liushui city in the daytime, there was no problem.

But when night came, things suddenly changed.

The immortal army of three thousand Holy Land suddenly rushed out of the shadow and attacked them.

If it had not been for the original sneak attack, the imperial army would have killed more Xianting Xianjun.

So far, it's useless to say that.

However, looking at the contents of the photo crystal again, Lin Qian also found two messages.

Night, shadow.

Looking up at the sky, the sun burning star is still hanging high in the sky. Only when the cold moon rises can we have a look.

The literati of the Ministry of heavenly work are trying their best to build the array. Ye Xuanyan, who is curious, also helps.

However, Xuanyan's ancestors, who followed the scholars of the Ministry of heavenly work, could only be regarded as an existence.

It's true that he is more horizontal and more skillful in the realm of cultivation. However, in the aspect of array, he is still far behind the scholars of the Ministry of heavenly work.

What's more, in order to ensure that the city array of Liushui city can be built in the shortest time, Lin Qian summoned the scholars of Ministry of natural engineering from the fantasy star. They are all the elites among the elites and feel that they are ordinary people.

Ye Xuanyan followed them, on the contrary, he was able to learn a lot and benefited a lot.

However, he did not expect that the array could be arranged like this.

Even, he found that some of the arrays arranged by the scholars of the Ministry of natural science had begun to show the shadow of the old array, and some seemed to be the fusion of the old array and the new array.

Curious under inquiry, ye Xuanyan is also from the mouth of the Ministry of heavenly work scholars, know this array, really so.

Although it is only an experimental product, not the final version, it should be more than enough for defense.

Just in time, after the two marshals of Shangyuan immortal Kingdom led the army to come here, we should try this array to see if it has come out.

After hearing the explanation of the scholars of the Ministry of heavenly work, ye Xuanyan only felt stunned.

This scholar of the Chinese empire is too terrible. He has just solved the enemy's array. When he arranges the array the next moment, he will begin to learn the enemy's means?

"Only by learning can we make progress, and only when we are not ashamed to ask questions can we improve. Even if we are enemies, we should face up to the advantages of learning." The words of the scholars of the Ministry of heavenly work can be remembered.

Ye Xuanyan suddenly thought of the fairy people. Sometimes he could do nothing about the enemy's strength and means. When he was disgusted, he thought that he would not learn from each other, but destroy everything of each other.

"The fairy people are stupid. They just stay where they are. If they are immortal, they will be the moths of the chaotic universe!" In ye Xuanyan's mind, the words Lin Qian once said to himself suddenly rang out again, and now he has deep feelings.

Lin Qian stood silently on the emperor's warship, carrying his hands, waiting for the coming of night.

As for Lin Zu, he wandered back and forth in the city in all sorts of ways, observing to see if he could find any loopholes and discoveries in the city, which could help his grandchildren.

With the passage of time, the night gradually comes, the whole Liushui City, is also in the dark, a house, is also gradually light up, gradually will illuminate the whole Liushui city.

However, when the lights are on, there will be shadows and darkness.

Although the night reward, Lin Qian is confused, and did not find any problems.

"In the end, where is the secret of this city?" Lin Qian thought to himself, pacing up and down the deck of the emperor's warship, thinking carefully,

suddenly, when Lin Qian looked into the distance, he felt something was wrong in the shadow of the bright house.

The shadow of the situation, as if it is a picture.

Lin Qian's mind, a flash of inspiration, if you understand, is in a hurry to order the emperor's warship launched, constantly upgrade.

The order from Lin Qian made the literati in the imperial warship hurry up and drive the imperial warship to fly away.

Ye Xuanyan and Lin Zu in the city were aware of the movement of the emperor's warship for the first time. They only felt that something had happened and fled.

On the deck of the emperor's warship, Lin Zulu first came to Lin Qian and asked, "what's the matter?"

He thought that his grandson might be in some trouble, otherwise, he would not let the warship soar.

However, instead of answering his grandfather directly, Lin Qian went to the front of the deck and looked down at the situation below.

"Grandfather, master, come and see." Immediately after that, Lin Qian's face showed such a smile and asked them to come and have a look.

Lin Zu and ye Xuanyan followed curiously, standing beside Lin Qian and looking down.When they looked at the situation on the ground, they were stunned.

"I see, ha ha ha." At the edge of the leaf Xuanyan, the first is to see the situation of the city below Maoni, laugh.

Lin Zu nodded to himself and looked at his grandson: "you can see the gains and losses, ha ha."

Lin Qian also nodded to himself. The dark shadow of the light in the house below clearly formed an array.

Some of the lights will be dim, but some of them will not go out.

But

Lin Qian suddenly raised his head and looked up at the sky, looking at the rising moon and stars.

Liushui City, there is a rule, that is, at midnight, do not light the lights, or Li cut unforgivable.

However, there is only one place in the city that is not bound by this rule, which is the city Lord's mansion.

Originally, when Lin Qian knew the rule of Liushui City, he didn't know why.

Now, he finally understands that this is to control the opening of the array.

When the moon star climbs to the top of Liushui City, the shadow of the whole city building under the moonlight will completely open the array.

However, if the light of the city Lord's mansion is bright, the array will be incomplete and cannot be turned on.

As long as the light of the city Lord's mansion goes out, the array will be completely activated, opening the channel of the space crack and leading to the underground.

In this way, the lights of the main mansion at midnight are the key to the array switch, which can be perfectly controlled.

Lin Qian is also very lucky. If he didn't destroy it when he attacked the city, then this array still needs to be repaired, which is a waste of time.

Now, he is quietly waiting for the moon star. When it rises to the top, he will completely open the array.

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