What can Chu Nan do? He could only smile awkwardly, "Uncle, you have a really thorough understanding! If I ask you to do research, you will definitely be a master."

"Hahaha, what kind of master am I? What other masters talk about is that if you don't clean one house, how can you sweep the world? What we are talking about is that if you don't clean the area under your responsibility, you will be fined." The cleaning man said with a wry smile.

"Children and grandchildren will have their own blessings. Sir, don't worry about it."

"I don't worry. I can eat as much as I want. My mother and I are just so energetic, and we have done everything we can."

"Uncle, how long have you been working here?" Chu Nan quickly changed to the topic.

"It's been five or six years. I used to work in a machinery factory and came here after I retired." The cleaning man said.

This made Chu Nan couldn't help but feel a little happy, he was looking for this kind of person.

"Uncle, there are many people here. People come and go every day, from north to south.

You must have encountered a lot of strange things while working here, right?" Chu Nan asked tentatively.

The cleaning man immediately became energetic and said with a serious face: "Don't tell me, it's true.

Two children were lost here last year, and I heard they were coaxed away.

I was at work at that time, my dear, there were more than ten police cars coming.

Hundreds of police officers turned the playground upside down!

Those two children, a boy and a girl, are said to be the children of a big boss.

The two of them were missing quite strangely! In broad daylight, there were so many people nearby, but they suddenly disappeared!

We chatted later and talked about everything.

Some said there was dirt here! The two children were pulled down by the dirt and died.

Some people said that they saw the two children when they were lost.

They both followed a woman.

Rich people offend many people, so the enemy took those two children away and killed them!"

"Following a woman? Master, who said this?" Chu Nan asked excitedly.

Of course, this guess is not reliable.

At that time, the police investigated all the surveillance videos. If someone saw the brother and sister, why didn't the police see them?

However, at this time, any clues are very precious.

Even if it's an unreliable clue.

It's better than nothing, right?

The cleaning man shook his head, "Oh, I really don't know his name.

My hair is quite long and completely white, and I dress very stylishly every day.

I heard people call him Teacher Zhang, he is probably a retired teacher.

That guy often comes here to play with his grandson. I guess he lives nearby.

He came here yesterday."

"What was he wearing yesterday?"

Chu Nan's words caught the cleaning uncle's attention.

"What do you do? Why do you want to inquire so clearly?" The cleaning man stared at Chu Nan defensively.

Chu Nan quickly took out his work ID card and said, "Uncle, I am a police officer, and I am currently investigating the case of the two missing children. Could you please help me? The clue you mentioned is particularly important to us."

"Police?" The cleaning uncle looked at Chu Nan in surprise, "It's been a year, right? You haven't found the children yet? Are those two children gone?"

Chu Nan said with some embarrassment: "We have been investigating, but there are too few clues in this case.

We don't even know how the two children left here, nor did we find out who took them away."

The cleaning man said speechlessly: "Why are you so rigid in your thinking? Someone else must have taken them away? What if the two children left on their own?"

Those two children have right arms and legs. If they want to leave, can one or two people watch them?

How smart are the children nowadays? They hide deliberately. Who can find them in such a big playground?"

The cleaning uncle's words simply made Chu Nan enlightened.

This man is so secretive!

Very strong reasoning ability!

This playground is full of big potholes and holes. It’s really hard to find where the two children are hiding.

Look at this manhole cover. There is a sewer underneath. How many people can’t hide under it?

And there, there is a big hole under the turf for the water pipe.

It’s quite big there, not to mention the two children and the two adults hiding there will be fine.”

The old cleaning man's words made Chu Nan's heart skip a beat.

He took a look at the location of the watering system and then calculated it based on the height of the bouncy castle.

If the two children walked up and down the inflatable castle to the lawn and then climbed over, they would have been monitoring the blind spot during this journey.

Chu Nan came to the location of the manhole cover of the water supply system and said, "Sister Sun, go find the person in charge of the playground and ask them to open the manhole cover."

When the manhole cover is opened, as the cleaning man said, the area underneath is surprisingly large.

The depth is almost two meters, and the length and width are two meters upward.

There is a motor, a water pump, and a thick black PE water pipe in the pit, with more than a dozen thin water pipes connected to it.

The remaining space is also quite large, and it will definitely be no problem to barely hide four or five people.

However, no clues were found inside.

In other words, it has been a year, there are only some clues in it, and this environment has long since disappeared.

Just when Chu Nan was a little disappointed, his eyes suddenly locked on a piece of mud the size of a small fingernail.

Unlike the yellow and black mud around it, this piece of mud looks a bit pink.

Chu Nan quickly jumped down and stretched out his hand to pull up the mud.

A small pink bear gradually appeared.

Take the whole thing out and you'll find a bear hairpin.

Chu Nan immediately thought that he saw Zhou Xinyi in the surveillance video, that is, the sister wearing a pink hairpin on her head.

However, due to the resolution and pixels of the surveillance video, coupled with the distance, only a blurry outline can be seen.

But Chu Nan has the skill of simulating portrait artist.

A little outline was enough for him to determine the shape of the hairpin.

It is certain that Zhou Xinyi was wearing a bear hairpin at that time.

Of course, just relying on a card won't cause any problems.

First, no one except Chu Nan could tell that Zhou Xinyi was wearing this hairpin in the surveillance video.

In addition, this is a playground, and there are as many as eight hundred children coming and going every day.

If you wear a hairpin of a certain style, the chances are high.

Therefore, this card issuance cannot be used as evidence for the time being.

However, when Chu Nan rinsed the hairpin clean, the row of small words on the hairpin made Chu Nan couldn't help but feel excited.

"Happy third birthday Xinyi! Love you mom."

"It's Zhou Xinyi's hairpin!" Sun Jingya couldn't help but said excitedly.

In contrast, Chu Nan was not happy.

After confirming that the card belonged to Zhou Xinyi, Chu Nan immediately thought of a question.

The two children were hidden here, and it was definitely impossible for the kidnappers to take them out that day.

No matter how playful two children are, they cannot endure being in a dark environment for more than ten hours.
Chapter completed!