Zi Yao frowned, these mice were born for more than forty days, and the black rats who laughed so loudly were already considered adults, and it seemed that they were going to Dongning City to find out.

A teleportation charm Zi Yao disappeared in place, that Dongning City they had been to, but it was a very small county town.

Like Beigucheng on the border, it was a county town where the plague broke out earlier, so there were no more people there, and they basically fled to the capital of Beiliao County on the south side.

Could it be that someone there is manipulating all this?

Zi Yao flashed again and appeared in the county seat of Dongning City, and only the call of owls could be heard in the silent city wall, because it was an empty city.

Therefore, no people have been sent to clean up and sanitize for the time being, after all, there are too many counties in the entire Northern Liao County that need to be treated and cleaned up.

Zi Yao kept skimming over the roofs of Dongning City, and there was a clattering sound, which was heard really in the night, and following the source of the sound, Zi Yao walked towards a huge courtyard.

Standing on a huge dead tree in the courtyard, Zi Yao was shocked by the scene in front of her, the courtyard was black and pressed inside, and the number was amazing.

However, these rats are all lying on their stomachs honestly, and they are not scurrying around, as if they are in a meeting, and they keep making noises.

Or is there something about this that attracts mice?

Zi Yao held her breath and searched for more than a dozen rats, the routes taken by these rats were rather chaotic, some of them had never been out of Dongcheng at all, and some came from the direction of the north.

However, all the routes shown on the map overlap very strangely, they are all walking in this courtyard, although there is some overlap, but the path seems to have been measured, all are parallel and equidistant routes, it seems to be overlapping, in fact, it is more like three-dimensional.

[Babao, could it be that there is an underground building in this courtyard?]

Babao scratched his head, [Can't see it?

The owner hasn't been here, so you can only give the corresponding map according to what you see, and it's only on the ground!]

Zi Yao nodded, let go of her divine sense and perceived it, there are really some criss-crossing passages in the entire underground, and it is very cumbersome, glancing at the mice in the courtyard, Zi Yao found from the jade bracelet space, the flashbang left from the exploration of the bat cave.

Grabbed two and threw them into the courtyard, but no sound came, except that after a burst of light that seemed like daylight, all the mice stood still.

Zi Yao took a deep breath, these species are not very powerful, but they are really disgusting, she lifted her breath and jumped towards the roof of the main house, and when she passed by a side room, her consciousness flashed and seemed to see some steps.

Zi Yao fell down to investigate again, and sure enough, there was something wrong with the wing, the door turned out to be a ten-centimeter-thick iron plate, and there was a huge rat guard inserted outside, and when she saw the heavy lock, she knew that there must be a secret here.

Zi Yao took out a hairpin, flicked it lightly in the keyhole a few times, and locked it with a click, and pushed open the iron door not as heavy as she imagined.

Holding a strong flashlight into the room, there were inverted grooves on the ground that resembled blind roads, a bit of an assembly line, Zi Yao suddenly realized, no wonder she felt that these mice were walking a little weird, it turned out that the roads below had walking passages.

Entering the wing room, following the direction of these passages to a wall, all the small passages on the ground disappeared here, Zi Yao observed the room, there was no furnishings, this was an empty room.

So she could only look for it on the wall, standing on the easternmost side, shining a strong flashlight, an obvious bulge appeared in front of her, Zi Yao walked over, stretched out her hand and pressed here, with Zi Yao's height to reach this position a little reluctantly.

It appeared that the one guarding the portal was a tall man, and with a creaking sound, the wall spun toward the west, and the dark, clammy air below drifted upwards.

Zi Yao let go of her divine sense, but she still didn't find the guards, could it be that these people have already given up here?

It is impossible, such a large amount of work, if it takes at least a few years to build secretly, they will never give up easily after such a large amount of effort, but it is possible to go out temporarily to avoid the limelight or just hide, after all, they will also be afraid of the plague.

Since there were no guards, Zi Yao flew forward, turned a descending curve, and a more spacious space appeared in front of him, but the width was not high, if the carriage was enough to be two in parallel.

Looking at the traces of rat droppings and some debris on the ground, Zi Yao judged that this was the source of all the rats who really came here, and they were continuously transported here in the hope that these infected rats would spread the plague.

Could it be that the people of this era have already used bacteria and viruses to wage war?

Zi Yao's brows became tighter and tighter, and he straightened his body and walked towards the source, almost five miles away, and an upward passage appeared in front of Zi Yao's eyes, but he also heard a sound of talking.

Zi Yao was startled, and hurriedly teleported back to the east wing, and restored all the doors of the east wing to their original state.

Leaning over the roof and perceiving with his heart, the two of them were not slow, and they were able to follow Zi Yao's steps to the corner below the wing.

A rough voice sounded, "Master Guoshi, now we have received the news, saying that the empress dowager of the Great Yan Kingdom led the army to Beiliao County and rescued many people, now we have a large number of rats, is it still useful?"

A man known as the national teacher smiled, "General Zeng has been worried, the deity and the saint have been planning for more than ten years, could it be that they were frightened by a yellow-haired girl?"

Although the empress dowager of the Great Yan Kingdom has medical skills, she is only one person after all, even if she can cure the plague?

We can change the disease again, and now the plague has been modified many times, and she can be cured at will, hehe, I don't believe it!"

Saying that, the national teacher didn't explain more, walked up to the east wing, and the mechanism had already appeared in the wing, Zi Yao turned around and glanced at the mice in the yard, they hadn't gotten up yet, and Zi Yao had an idea with a roll of his eyes.

An illusion was put into the entire courtyard, Zi Yao was already sweating on her forehead, it seemed that she was negligent in cultivation, and such a simple illusion took so much effort to catch a Guyuan Pill and take it.

Closed his eyes and sensed, the two really walked up, Zi Yao crouched on the roof of the main house and held his breath, the two of them said and stood at the window of the east wing, and the national teacher pushed open the window.

Zi Yao was stunned when he saw the appearance of this national teacher, this person actually had a seven-point resemblance to Murong Hao, only to see him take out a bamboo flute, send it to his mouth and play it continuously.

Although Zi Yao didn't understand, he knew that it was supposed to be a summoning technique, did he want to control these rats?

What kind of national teacher, it turned out to be a beast tamer, or training such a disgusting mouse.

Zi Yao raised her eyebrows, then let's have some fun, let you pretend to be a big-tailed wolf, and I will give you a collective suicide!