The so-called "that thing".

Ji Yiming had already heard almost a calloon in his ears in the mouths of Ying Xingtian and Yu Zhenzhen, but the latter two were vague every time, and they were half-cut and secretive. He only knew that Yu Zhenzhen had left secret words several times to point to different ruins, whether it was in the ancient kiln city of Shanglin Lake or the "former Qing ancestral land" in front of him, it was all for the so-called "that thing".

It is not found in the ancient kiln city of Shanglin Lake, so this former Qing ancestral land is ......

Will there be?

With many doubts in his heart, and at the same time, he had to release his spiritual sense to pay attention to the surrounding situation, knock on the wall to find the location of the next dome building, and the speed of the three people and the snake naturally slowed down.

A full ten minutes passed, and according to the record of Yu Zhenzhen, who kept leaving the mark of the notch, only two or three kilometers had advanced.

No new dome structures were found, and no second Hidden Dragon Abyss or Yandao members were found.

Ou Haichao, who was tied to the back of the Gu snake Xiao Yang, breathed steadily and closed his eyes, but even if Xiao Yang, who was scurrying left and right from time to time, hit his head, hands and feet against the masonry wall inadvertently, he still didn't react.

Fortunately, after all, the Lying Silkworm Mei Daoist has the strength of the Grandmaster Realm, although the loss of consciousness and internal breath also flow in the meridians, and cannot automatically circulate throughout the body to protect the body, but with the physical strength of the Dao Sect Sect Master, he will not be injured by these small bumps.

Ji Yiming also occasionally drank the Gu Snake Xiaoyang who was scurrying around with his temperament at first, and after a long time, he didn't pay much attention to Ou Haichao when he saw that he didn't react, and only kept knocking on the masonry wall with Yu Zhenzhen and occasionally punched a hole, but unfortunately no new clues were found.

As the time passed, the internal breath of the two of them was more or less consumed, and they each took out the array disk and held it in the palm of their hands and began to recover slowly.

At the moment, in this situation where there is danger lurking at any time, and even the masters of the Grandmaster Realm have been made unconscious, even if they have the same Grandmaster Realm Gu Snake Xiaoyang by their side, the two of them dare not slack off in their hearts.

"Hey, here...... It seems that there is a chance. ”

When Yu Zhenzhen, who was walking behind Ji Yiming, knocked on a wall on the right side of the corridor, he suddenly stopped, and his face moved slightly: "You listen to the voice." ”

The cyan masonry that she was striking really made the same hollow and crisp sound as the previous dome building.

Ji Yiming also stopped instantly, and there was a little surprise in his eyes: "Try it, it's very likely." It's just that I don't know if it's the same 'yurt' as Fang Cai. ”

(And inside the yurt, there will be a wooden array plate with images from hundreds of years ago?) ）

Yu Zhenzhen knocked on the brick wall again, and was about to take half a step back to bombard the wall with all her might—inside the cyan brick wall, there were actually a few gentle knocking sounds.

Inside, there are people!

Ji Yiming and Yu Zhenzhen took a few steps back at the same time, and the expressions on their faces instantly became solemn.

In the dark corridor, the rest of the place was silent. Even the Gu Snake Xiao Yang behind the two of them knew that the situation was grim at the moment, and swam directly to a position less than half a meter away from Ji Yiming, and a pair of golden copper bell eyes on the huge head stared at the masonry wall where the knocking sound came back, and the power of the Grandmaster Realm on the snake body quietly flourished.

One second.

Two seconds.

Three seconds.

For a few seconds, there was no second knocking on the wall.

Ji Yiming turned his head and glanced at Yu Zhenzhen, took out an old power bank from the schoolbag with his backhand, and smashed it towards the brick wall with his shaking hand - it did not contain too much internal breath of "Taiyi Longevity", and the half-brick-sized power bank smashed into the brick wall only sounded a dull sound of "bang", splashing a few small pieces and not smashing out the hole.

At this moment, a few knocks, not light or heavy, sounded again from the other side of the brick wall.

……

……

Standing at the end of the square, at the foot of the three-meter-high cyan city wall, the four of them all looked up slightly.

The battlements of the "concave" and "convex" shaped city walls are at least six or seven hundred meters from left to right, and there is still more than ten meters of space on the top. Under the light of the blazing flames of the Dan furnace behind him, it can be clearly seen that the wall is not smooth and flat, but has many fine and dense small cracks and cracks.

"Traces of arrow wounds, wood wounds, burning oil, and siege ladders. Ji Daoyan looked carefully, and casually explained the origin of each trace: "This is not a city wall for decoration in the ruins, but a real city wall that has really been attacked, defended, and experienced countless siege and defense battles. ”

"But this kind of underground environment, and there are all dead ends behind it, how could there have been siege battles?" The three of Qianlong Yuan knew his identity, and they also knew that this "Yandao" leader was far superior to him in terms of historical knowledge, but they still couldn't help but have some doubts: "Could it be that the entire section of the city wall has been moved underground here from the outside?"

"It may not be possible to rely on modern engineering equipment, and this kind of engineering volume and construction trouble is enough to rebuild 100 identical city walls. Yan Siguang pressed the wall and looked up: "Let's turn over and see what's behind first." There's no second passage here, and Boss Win must be teleported outside the city walls. ”

Ji Daoyan's expression did not change, and he took a deep look at this cyan city wall that was full of a thick sense of history in his senses, and seemed to hide countless stories and scarred, and then shook his hand and punched out three golden "sun swords" to make a statement.

In the light of the old Dao Sect Master's auxiliary order, Yan Siguang, Zheng and Niu only felt that their bodies were light, and the whole person floated directly upwards for a full four meters without any force, and was pushed forward by the force generated out of thin air, and stood firmly on the battlements about one meter wide of the city wall.

And the scene behind the wall also entered their line of sight at this moment.

As the only "witness" among the four people present who had entered the Shanglinhu Ancient Kiln City and experienced the danger of that ruins, Yan Siguang certainly remembered that there were also patches of cyan city wall buildings at the bottom of the ancient kiln city and at the borders of all the ancient Yue kilns.

It's just that half of the city wall there is for decoration, and the other half is for carrying the "Raccoon" sculpture to suppress the sleeping ancestral Gu consciousness in the "Transformation Ancestor Gu Array" under the Great Unification Array.

Behind the city wall are large blocks of mountain rocks, so naturally there will be no more mysteries.

But at this moment, standing on top of the battlements of the one-meter-wide city wall...... What the four of them saw was an endless stretch of houses, streets, playgrounds, and buildings. As far as the eye can see, all kinds of buildings are lined up one after another. About every few hundred meters, there is a Dan furnace-shaped fire that is the same as on the playground, and the whole "city" is illuminated with shadows and shadows, which is full of weirdness.

A bustling city, brightly lit and deserted streets.

If you look closely, you can see that there are scattered dishes and chopsticks on the table in the sake shop, and the wine and food that have been corrupted into fossils. The open doors of the houses along the street are full of tables, chairs, benches, pots and pans, as if this castle was built at a depth of many meters, and countless residents lived here.

"It's incredible. ”

The Niu Minister of the Logistics Department of Qianlong Yuan let out a long sigh of relief and praised in a deep voice: "To be able to build such a huge city in the underground ruins, even the details are perfect. Hundreds of years ago, how many manpower and years did the ancient craftsmen and practitioners of the former Qing Dynasty spend so many years to complete such a great work?"

None of the people present were the first brothers to explore the ancient ruins, but even the leader of the "Yan Dao" organization, Ji Daoyan, had never seen anything comparable to it in his previous experience.

The look of surprise in his eyes gradually dissipated for a long time, but his eyes suddenly stared slightly at a place in the city below.

"That's ...... Arsenal?"

The other three followed his gaze, and soon found a spacious storehouse in an empty camp in the city. In the double-open door of the storeroom, there are countless well-made vajra armor, all kinds of weapons, saddles and other equipment.

The number should be enough to equip an army of more than 1,000 people.

But the focus of the four of them was not this, but the armor, weapons, and saddles were etched with the black patterns they were all familiar with.

Formations.

Although it was impossible to tell what the formation was from this distance, it was enough to judge that this was a batch of army-standard equipment with cultivator formations.

The Iron Law of the Practitioner's World –

Practitioners are forbidden to participate in the wars of the ordinary world in any way.

And these standard equipment with depicted formation patterns are obviously impossible for ordinary people to use.

"Hundreds of years ago, in the process of unifying several Jurchen tribes, Nurhachi ...... What the hell is going on?"

Ji Daoyan, who was very familiar with this history, looked at the rest of the city again.

And this time, he and the other three saw something more.

Under the kitchen stove in the wine store, there is a combustion support formation.

On both sides of the double gate of the dwelling, a defensive formation is engraved.

The post station near the city gate is scattered with horseshoes engraved with the Wind Formation.

Even on both sides of the principle that extends in all directions, ventilation and cleaning formations are engraved.

"This is not an ordinary city built underground, but a city with an army of cultivators, where residents can use the cultivator formation to work and live, and even form an entire vast practitioner circulation system. Ji Daoyan looked at the three people around him and said in a deep voice: "The ancient cultivators who built all this must have a large number of cultivators and craftsmen under their hands. But I have never seen any trace of it in the historical records. In your Qianlong Yuan classics, are there any records about the large-scale projects in the cultivation world of the former Qing Dynasty and Nurhachi's era?"

Yan Siguang, who only studied the formation, and Zheng Changlin, who had been fighting for most of his life, looked at each other and shook their heads blankly at the same time.

Only Minister Niu of the Logistics Department can keep up with the rhythm of Ji Daoyan: "No, but such a huge project, there should be some clues left anyway...... It's weird. ”

Ji Daoyan shook his head lightly, did not continue to entangle, and directly jumped off the three-meter-high city wall and walked in the direction of the armament depot.