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The monitoring has turned on the smart mode. In this mode, the monitoring will carefully move to where it wants to go.

The two of them stared at the moving video together.

In the video, the picture kept moving forward, and Xiao Ning was also very nervous.

It seems that this is not the first time for the young Xiao Ning to make machinery. She is quite skilled in making machinery.

However, Xiao Ning is worried about whether her machine is stable enough in this era. If it dies midway, it will be... bad.

Some people in the research institute may seem friendly, but in fact, none of them are good people.

Fortunately, no one was moving around the research institute in the middle of the night, and the little thing finally quietly came to the door of a room.

This is a laboratory.

Every time a child is left alone, they are brought here.

At night, there will be no children noisily looking for their friends who have not returned home, because every night they drink a cup of milk with added ingredients. Milk is children’s favorite thing to drink. After drinking the milk, everyone The children will fall into a deep sleep.

"Zi-"

A slight, subtle sound came.

The sound came from inside the room.

There was such a sound inside the laboratory at night.

The small monitor just stayed at the door.

The scene is frozen here.

It's just a small monitor, and it can't open the door in front of it.

Xiao Ning and Xiao Hei looked at each other.

They had been preparing for a long time, piecing together everything to make this thing.

What to do now?

After thinking about it, Xiao Ning said:

"Otherwise, let's wait for a while. If the people inside are not ready to come out, I will ask the surveillance camera to go elsewhere. Find a way."

In the institute, the children's activity areas are restricted. They can only move in three places: the children's playground, the training ground, and the living area. They have never been to the rest of the places.

The end of the living area is the dangerous insect area, so the protective cover is closed over there and no children can get out.

Therefore, none of them have ever left the institute.

And none of the children who have left the institute will come back.

Every time Xiao Hei mentioned this, he couldn't help but sigh.

Because he didn't know whether the children who went out didn't want to come back so much, or whether they couldn't come back at all.

"It would be nice if we could let it go to the ladder, but it can't go there."

Xiao Hei sighed regretfully.

It’s not every day that the doors of the ladder are opened for children to climb on.

That is a place only children who have the right to choose can go.

And choosing...

Xiao Ning and Xiao Hei both dislike these three words.

They are all orphans and have lived in the institute since childhood. The institute said that they are poor children without the love of their parents.

However, as long as they work hard and strive to become excellent children, then someone will know their excellence and know how good they are. In this way, someone will like them, select them and become their children.

When the researchers at the institute said this to Xiao Ning, Xiao Ning simply thought at that time, isn't this an orphanage?

However, the difference between a research institute and an orphanage is still very big.

"Yeah, it can't go."

"Then you let it go around and see if anyone else is doing anything? If there is no one everywhere tonight, I can find a way to get Researcher Li to open the door."

"Are you crazy? There is no need to take risks at this time."

Xiao Ning didn't agree with Xiao Hei's idea, and he was injured.

"Your wound smells like blood. Researcher Li has a very good nose. He will smell your scent."

After Xiao Hei heard Xiao Ning's words, he looked down at his wound, and then sighed.

Researcher Li is particularly sensitive to the smell of blood. Even if he suffers a small injury, he will know it as long as the wound bleeds.

"Well, let's wait and see if he will open the door."

Xiao Ning decided to adopt her original plan and waited for Researcher Li to open the door.

However, after waiting for more than half an hour, there was no sign of the door opening.

Xiao Hei shook his head helplessly and said:

"No, he is very focused on what he is doing, and he usually prepares everything very well. When everything is complete, there is no need for him to open the door and come out unless someone knocks on the door."

"Too……"

Xiao Ning agreed with Xiao Hei's statement.

Soon, she caught an important point.

Knock on the door.

"Yes, if someone knocks on the door, he will always open it, right?"

Xiao Ning had an idea in his mind and started to recall the monitoring.

The little surveillance camera slowly returned to Xiao Ning and Xiao Hei.

Xiao Hei said doubtfully:

"How did you get it back?"

"I let it learn to knock on the door. As long as it knows how to knock on the door, Researcher Li will open the door."

After Xiao Ning finished speaking, his face was full of excitement.

"Ok?"

Xiao Hei became even more confused.

Immediately afterwards, Xiao Ning started to make something again.

Soon, her results came out and the surveillance came back.

The surveillance system has been remodeled, but there are no changes in other places, except for the small upgrade of the internal intelligent system.

"listen."

Xiao Ning asked Xiao Hei to listen.

The next second, there was a knock on the door.

"Um?!"

Xiao Hei was on guard for a moment. Was this someone knocking on Xiao Ning's door?

Who is coming?

Xiao Hei reacted instantly. Xiao Ning looked at him and couldn't help but raise the corners of his mouth.

"Dong dong dong..."

The knocking on the door continued.

Xiao Hei said a little flustered:

"Xiao Ning, I have to find a place to hide."

As soon as Xiao Hei finished speaking, Xiao Ning immediately stopped and said:

"There's no need, there's really no need. No one knocked at the door, it was the one who knocked."

Xiao Ning stretched out his hand and pointed at the smart surveillance.

"it?"

Xiao Hei looked at the smart surveillance system suspiciously.

"That's it. If you listen again, I'll let it continue to knock on the door."

After Xiao Ning said this, he asked the intelligent system to knock on the door again.

"Dong dong dong..."

The knock on the door sounded again.

Xiao Hei finally believed that it could only be done by the system.

"This time, if it sets off, it will definitely allow Researcher Li to open the door."

Xiao Ning said confidently.

"Ah."

The surveillance camera started again and cautiously arrived at the door of the room.

then……

"Dong dong dong..."

There was a knock on the door.

"Dong dong dong..."

The knock on the door rang every three seconds, and then again every three seconds.

"Dong dong dong..."

Finally, just when there was a knock on the door for the fifth time, the door opened.

Researcher Li appeared with a gloomy look on his face. The small surveillance camera used every opportunity to sneak into the room.

Researcher Li looked at the empty corridor outside and wondered:

"There's no one...who's knocking on the door?"