"No problem at all!"

Gu Yi agreed to Zheng Ziyan's request without hesitation.

Since Zheng Ziyan can help, he is naturally willing to help her.

When Zheng Ziyan heard Gu Yi agree, she immediately opened the car door and asked Gu Yi to get in.

"Zi Yan, don't promise things you can't do and hinder Gu Yi."

Li Yunsi said a little worriedly.

I’m afraid that Zheng Ziyan will do something rashly and unsure, causing Gu Yi to be delayed.

"If I dare to say it, I am sure of it. I won't brag."

When Zheng Ziyan saw that Li Yunsi actually questioned her, she immediately responded with dissatisfaction.

"Believe me, I will definitely solve the secret of this Sudoku and help Gu Yi find Gurongi."

Zheng Ziyan assured with a confident look on her face.

"Well, you have already known each other, and you all know that I am Kuga."

At this time Gu Yi asked curiously.

Because Zheng Ziyan and Li Yunsi learned about Gu Yi's identity separately, and they promised not to disclose Gu Yi's secret.

So now when Gu Yi saw the two of them discussing the matter of Gu Yi and Gurongi as if they were alone, he couldn't help but ask out of curiosity.

Hearing Gu Yi ask this question.

Li Yunsi and Zheng Ziyan both looked a little embarrassed.

"Because I thought Zi Yan actually knew about you, so I told her, but I didn't expect that she also knew about it."

Li Yunsi lowered his head helplessly and answered.

"I didn't expect Senior Sister to know. It was you who had to act like a hero and transform in front of Senior Sister."

Zheng Ziyan said while pouting and playing with her hair.

After hearing this, Gu Yi just scratched his head in embarrassment.

Forget it, this little thing is not important. They both guessed it anyway, so it doesn’t matter if they know it to each other.

Then Zheng Ziyan began to study the Sudoku in her hand. She looked quite good at it and seemed to really understand it, so Gu Yi didn't dare to disturb her.

After arriving at Zheng Ziyan's home, Gu Yi went into the kitchen and cooked for the two of them.

Zheng Ziyan continued to study Sudoku, looking very serious.

It was so serious that even Li Yunsi had to look shocked.

It was the first time she saw Zheng Ziyan being so serious. Was it for Gu Yi?

This made Li Yunsi suddenly feel like he didn't want to lose to Zheng Ziyan, so he started to study Sudoku as well.

After about half an hour, Gu Yi finally finished cooking.

During this time, he had been following the news and monitoring websites, but there was no sign of Gurongi.

But this does not mean it is safe, perhaps it just has not been discovered.

"The dishes are ready, Zi Yan, have you figured it out?"

After Gu Yi brought out all the dishes, he asked.

"There are a few left, wait a moment, it will be quick."

Zheng Ziyan kept rubbing her temples while speaking, and looked like she was overworking her brain.

Then he stared at the paper, turning the pen all the time, thinking about what to write next.

"I have calculated it, see if it is true."

Just then Li Yunsi suddenly spoke like this.

Then she picked up the paper she had written and placed it in front of Zheng Ziyan.

After seeing it, Zheng Ziyan was surprised.

"Really? You can do it too!"

This made Zheng Ziyan look at Li Yunsi in surprise.

"I'm smarter than you. If I understand the rules, I can do it."

Li Yunsi said with a proud look on his face.

"Tsk, you're just lucky, why are you so proud?"

Seeing Li Yunsi belittle herself, Zheng Ziyan immediately pouted in dissatisfaction.

"Are you really done?!"

After hearing this, Gu Yi immediately ran over excitedly.

"Well, once you fill in all the empty spaces, that's it."

After Zheng Ziyan finished speaking, she handed the paper to Gu Yi.

The above content is as follows (you can see the pictures in the paragraph comments).

675423981

184769235

932815476

391254768

726981543

458637192

843592617

569178324

217346859

"Is this the answer? If I were to pick out the answer separately, it would be..."

"7,18,9,2,23,9,15,98,35,4,6,91,726,8,543, 458,63,19,8,3,59,6,7,56,1,24,17,34,5."

After Gu Yi read out the answer, he began to think about how this related to Gurongi's rules.

He carefully recalled the details of House's attack on Lin Yueqing last night.

At that time, he seemed to ask Lin Leqing, customer No. 23, why did he ask that?

"Wait a minute, number 23, the answer to Sudoku also has 23!"

Thinking of this, Gu Yi immediately figured out the answer.

Just then, the cell phone he used to contact An Xin rang.

After Gu Yi picked up the phone, he was about to answer it, but considering that Li Yunsi and Zheng Ziyan were nearby, he apologized, went into the kitchen, closed the door and answered the call.

Zheng Ziyan was curious and wanted to move closer to listen, but Li Yunsi stopped her and told her not to do anything rash.

"Mr. An Xin."

Just as Gu Yi was about to say that he had figured out Gurongi's killing sequence, An Xin spoke first.

"Gu Yi, it's bad. That Gurongi has killed people again. He killed 10 people today, all indoors. The surveillance cameras and CD beasts outside couldn't capture them!"

An Xin said seriously.

"No way! Aren't the police checking every delivery man and patrolling everywhere?"

Gu Yi was shocked after hearing this.

"After all, we didn't know what Gurongi looked like when he turned into a human, so it was easy to miss something. And the seven people he killed were all in an office building, so it went so smoothly. When we arrived, he had already run off to somewhere."

Even though I couldn't see An Xin's face, I could feel how angry he was.

"We don't know the pattern of that guy's killing. We are really too passive. By the way, our people studied the paper and found it to be a Sudoku puzzle. They also wrote down the answer, but what does it mean?"

An Xin explained that the police have also studied the Sudoku left by Gurongi, but have not yet figured out the specific pattern.

"I roughly guessed what happened. Can you tell me the takeaway number of the victim this time?"

Gu Yi asked.

"Takeout number, wait, I need to check."

After An Xin finished speaking, she hung up the phone and went to investigate.

When the victims died, photos of the scene were taken, and the takeout orders were also photographed, so An Xin could find them with a little time and then send them to Gu Yi.

"Meituan No. 7, Meituan No. 18, Meituan No. 9, Meituan No. 2, Meituan No. 23, Meituan No. 9, Meituan No. 15, Meituan No. 98, Meituan No. 35, Meituan No. 4, Meituan No. 6, Meituan No. 91, Meituan No. 72 and Meituan No. 26!"

After Gu Yi looked at the victim's Meituan order number sent by An Xin, his pupils immediately dilated, confirming his guess. It was indeed true.

Then Gu Yi immediately called An Xin.

"Mr. An Xin, please look carefully at the Meituan number and see if it matches the answer to the Sudoku puzzle!"

"Let me see... Hey! It really matches. Could it be that this Gurongi killed the customers with the corresponding Meituan numbers according to the answers to the Sudoku puzzle?"

An Xin immediately understood what Gu Yi meant and gradually understood House's killing rules.

"But wait, I don't see Meituan Takeaway No. 726."

At this time, An Xin discovered that the 726 in the Sudoku answer did not appear in the victim's Meituan takeaway account, and she couldn't help but feel puzzled.

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