Many years ago, on Saturday, July 11, Didan Primary School.

While washing dishes after lunch, Kudo secretly came to Ran and invited confidently, "Do you want to go hunting for treasure together?"

Lan blinked and remembered what happened last night, "You mean..."

Kudo quickly interrupted, "Shh! That's our secret."

Lan covered her mouth and asked in a low voice: "Have you unlocked the code?"

"Well," Kudo smiled happily, "We will meet at Dr. Agasa's house later."

"Okay." Lan nodded and replied.

Yuanzi jumped out, "What are you talking about?"

"Nothing." Kudo slipped away.

Garden transfer target, "Lan?"

"It's really nothing." Lan speeded up.

"Say or not."

"It's really not."

Yuanzi smirked and tickled Lan, and Lan ran away with a scream...

In the afternoon, Dr. Agasa's house.

Knocking on the door, Lan said, "I'm disturbing, Doctor."

Dr. Agasa, with dark hair, smiled and said, "It's okay, I'm very happy. I haven't seen you two be together for a long time. You two always played together before, but recently they suddenly separated, which made me very worried and doubt whether you were quarreling."

Kudo defended: "It's not that, right, Maori?"

"Yeah." Lan was a little uncomfortable.

"Maori?" Dr. Agasa was a little surprised.

"It's Maori classmate." Kudo said, then asked anxiously, "Let's stop talking about this, Doctor, can you drive us out?"

"No problem," Dr. Agasa agreed immediately, "Where is it?"

"Kutokawa." Kudo said.

Lan asked, "Why go there?"

"I'll tell you on the way, let's go quickly." Kudo urged...

Cupo Port.

There are many policemen on the dock. The murderer has already caught the murder incident last night and is now collecting evidence.

According to the red one mentioned by the Shadowman, Kudo put a piece of paper on the red fire hydrant, which was red to the outside. If you don’t look carefully, you won’t be able to see it.

Another code.

Kudo thought that Toriya Sluice, but after going there, he didn't find anything red. When he was about to go to Toriya Castle that Dr. Agasa said, the alarm light at the railway intersection rang, and it was red.

Kudo pressed a piece of paper on the railing, with a yellow bottom or a code.

According to the code, I found the school next to the Osaki Post Office, and found another code under the red "Stop" street sign, the paper has a silver-gray bottom.

The six Chinese characters of rice, flowers, China, Shi, Dong, are in a box.

At this time, Maori and Meguri police departments drove by.

Maori discovered Lan and stopped, "Lan, why did he come here if he doesn't go home after school?"

Kudo rushed to answer: "The doctor wrote a few secret codes. We are playing the game of decrypting secret codes, right, Doctor?"

"Ah? Well." Dr. Agasa said with a wry smile.

The police department of Memu laughed and said, "It's so missing to solve the code. I also played puzzle games with my companions when I was a child."

Lan said: "But this is so difficult, I can't understand it at all."

"Show me." Maori reached out.

"Yes, but it's really hard." Kudo said.

"What are you talking about? We are policemen." Maori snatched the secret code, "You can understand this secret code that cheats children by just looking at it."

However, Maori looked at it and sweat came out because he couldn't understand it at all.

"Well, anyway, this seems to be a secret code with a good idea."

Kudo teased, "What, isn't it ununclear?"

Maori pretended not to hear the code and returned the code to Dr. Agasa, and then asked Meguro Police Department, "Police Department. How about the one I've been tonight who hasn't played for a long time, mahjong?"

The police department of Meguru laughed and said, "I think so too. I don't know why, but after reading this code, I want to play mahjong."

Maori touched Lan's head, "Then, Lan, I'll leave first, go home early."

"Well, goodbye Dad," Lan waved.

Dr. Agasa smiled and said, "I will send her back."

"Then please." Maori and Meguri police station got in the car and left.

Later, according to the rules of the profound entertainment activities of mahjong, Kudo believed that the secret code refers to the three words "Dongfengchang Guoshi Wushuang card type draw, field, card type, and draw" that are combined into the district office.

There are no district offices in Mikacho, only the exit offices, but this doesn't matter.

The three of them looked for a while and found a red flag. They found a code on the flagpole, which said the end, which was the last one.

s→w

It's just dusk and the sunset is extremely beautiful.

Kudo believes that the code is to let them see the West and see the beautiful sunset.

Lan exclaimed: "So beautiful."

Dr. Agasa smiled and said, "So that's the case."

Kudo suddenly laughed, "Hehe, I understand, who is the author of this code?"

"Who is it?" Lan asked.

"It's my dad." Kudo said, "It must be his dad who asked his friend to make this code to lead us here to see the sunset. The reason is probably because I have been staying at home and reading books recently."

Dr. Agasa said: "But you might meet the man who gave you a secret code because he happened to go to school at night."

Kudo said: "The monster story in that library, Yuanzi and Ran said they were told by an uncle in the library. Most of the uncle is the man who was at school at night."

Lan blinked her eyes. Did she hear it wrong just now?

Dr. Agasa said, "Oh, so he knows you, and he knows you very well. As long as you tell Lan and Yuanzi about this, they will tell you. If you like mysterious events, you will definitely go to school."

"That's right, so it must be my dad." Kudo said, "We were all fooled by him."

Lan shook her head and said, "No, it's not great, you can still see such a beautiful sunset."

"Although I'm a little unwilling to accept it, I think so too, Ran, sorry, Maori." Kudo blurted out again, then reacted and quickly changed his words.

"No, just call me Lan." Lan shouted excitedly, then felt a little embarrassed, lowered her voice and asked expectantly, "Just call me Lan, is that okay?"

"If you think it's good, it doesn't matter me." Kudo was a little embarrassed. He just followed the local customs and was called Maori, and he was not used to it.

"Really? That's great, Shin-chi!" Ran hugged Kudo and spun with him.

Kudo's feet were off the ground and shouted in fear: "Stop quickly!"

Dr. Agasa smiled and helped the two of them to stand up.

Lan clapped her hands and said, "By the way, I'm going to thank Shinichi's father."

Kudo smiled and said, "Follower, if you want to thank me, I will thank you who is still nearby. The friend of Dad who gave me a secret code is fine."

Dr. Agasa looked around and asked, "Hey? Is he right here?"

Kudo smiled and said, "In order for us to see the sunset at the right time, he should have been watching us all the time, because he doesn't know how long it will take for us to unlock the code."

Dr. Agasa said: "That's right. He has been observing our progress. If we untie the code, he will take the lead in preparing the next code and adjusting the time. As long as we arrive at this time, it doesn't matter what the code in the middle is."

Lan asked, "But that person may be Shinichi's father, isn't it?"

Kudo smiled angrily and said, "No, if this person was my father, he would appear now and say something like 'Why does it take so long'."

Dr. Agasa smiled and said, "Well, indeed, this is the style of Youshu."

Lan put her hands in a trumpet shape and placed her voice in a loud voice, "Uncle last night, you must hear it. I will put my feelings in the wallet you gave me yesterday. Remember to come and get it, just hide it in that bookcase, next to the place you stood last night, you must see it."

Dr. Agasa smiled and said, "It's enough to hear your words."

"Let's go, it's time to go home." Kudo smiled, "Maybe Ran, your mother has already gone to my house."

"Ah, then go quickly, go quickly." Lan said anxiously...

On the other side, Kudo family.

After Akiko responded to the door, she saw that it was Eiri, who had a tight face and looked like she was urging an insult to the crime, and immediately smiled, "It's Eiri, come in and sit down."
To be continued...