Stay away from Conan.

Thus, based on the limited clues, Gao Yuan analyzed the starting point of the whole thing, that is, the truth about Keisaburo Axie's so-called treasure, and roughly came up with a guess about what this treasure was.

Keisaburo Axie was probably secretly researching some weapons at the request of the Japanese authorities at that time, but the weapon was not successfully developed until Japan was defeated.

As for the secret of the so-called treasure, it is very likely that it is the place where Keizaburo Axie secretly developed the secret weapon. After all, as a secret weapon that needs to be developed in secret, in order to research this thing, there must be a secret place that cannot be discovered by outsiders...

Therefore, if you think about it this way, that place should be somewhere where few people go.

And in a place like Hakodate, a coastal city, where would Keisaburo Axie look for a place?

Is it a hidden island, or is it simply hidden in the mountains?
Anyway, that place has not been found since the war. In addition to its hiddenness, it is also very likely that it was built in a place that is not convenient for development. So subconsciously, Gao Yuan can only think of the hidden islands in the surrounding sea or the only Mt. Hakodate in Hakodate City...

However, at this point, it is only speculation and there is no way to really find the location of Keisaburo Axe's treasure. But based on these, one thing that can be more certain is that if everything is really as he thought, then it is normal that the secret of the treasure would not be leaked, and the sudden appearance of Dongwan Ronglong's clues has become even more suspicious.

Even if Keisaburo Afue borrowed some things from his idol Hijikata Toshizo in order to choose this secret location for weapons research and development, aren't these six short swords forged by Tokugawa Eiryu a bit far-fetched?
Therefore, Gao Yuan felt more and more that the real secret had nothing to do with the six daggers, and the news linking the search for treasure with Dongwa Ronglong's six daggers was more like a rumor deliberately spread.

Therefore, if we think about the problem of Hei Yu Dao Yi back then, Hei Yu Dao Yi at that time definitely could not collect all six short swords, and the clue of Dongwa Ronglong only appeared recently, and it definitely did not exist back then, so when Hei Yu Dao Yi wanted to find the whereabouts of the treasure at that time, he must have had other ideas -

But what is this idea...

Perhaps we can try to find clues from history.

but……

Thinking of this, Gao Yuan couldn't help but feel helpless——

When it comes to Japanese history, I know nothing about it! Even if Keizaburou Axie might refer to the story of Hijikata Toshizo to find the secret location, even for a person like Hijikata Toshizo, I only know a limited amount.

So, at this time, the only thing we can do is try to look back at history...

Or maybe someone to ask?
Just as Gao Yuan was thinking this, he heard the sound of a helicopter passing by him again...

……

As time gradually turned into evening, they got off the train at Yukawa Station in Hakodate. While the detectives were investigating, Xiaolan and Kazuha took the opportunity to travel around Hakodate. As for Sonoko, she still had to contact the Axe Foundation to discuss the transfer of relevant collections, so she did not come out to play with Xiaolan and the others.

"I'm sorry, I was so happy that I accidentally got to the terminal..."

So, they originally wanted to take the train to travel around Hakodate together, but now they got off at the terminal. Kazuha seemed a little reluctant and apologized to Xiaolan.

Regarding this situation, Xiaolan couldn't help but say:
"No, I just wanted to experience the tram."

Having said this, the two people stepped off the train and stood on the platform, looking at each other and smiling.

However, at this moment, a car drove up the road and stopped at the station where Xiaolan and her friends were, and honked, attracting their attention. Xiaolan and her friends looked at the car and found that it was the car driven by the police officer Kawazoe Zenkyu who they had seen not long ago. As the driver's window was rolled down, Kawazoe Zenkyu appeared in the car and said to Xiaolan and her friends:

"Hey? You guys are with Detective Akechi and the others, right?"

Because during the day, thanks to Gao Yuan and the others, Kawazoe Zenkyu had seen Xiaolan and the others, so this time, as if they happened to meet here, Kawazoe Zenkyu came over and asked kindly, feeling that it was getting dark, and Xiaolan and the others were at the tram terminal, so transportation might be a bit inconvenient.

So, just like that, Kawazoe Zenkyu offered help to Xiaolan and the others, saying that he could give them a ride. After inviting them to get in his car, Kawazoe Zenkyu said that before sending them back, he wanted to stop by a place to take a look.

In this way, Kawazoe Zenkyu drove Xiaolan and Kazuha to a mansion called "Fukujo" -

At this point, Hattori Heiji and Conan had already arrived here on a motorcycle.

——“This is it.”

Looking at the surname "Fukushiro" written on the doorplate outside the mansion, Hattori Heiji couldn't help but say this.

After learning the whereabouts of the last two daggers of Tokugawa Eiryu from Kaito Kid and finding out the address of a high school teacher named Fukushiro Ryohei through the police, Hattori Heiji and Conan rushed over directly.

Seeing that they were the only two people here, Conan couldn't help but ask Hattori Heiji:
"Have you told Inspector Nishimura all the details about Fucheng?"

6◇9◇Book◇Bar

"Of course. I told him to give him the knife and to meet him here."

As Hattori Heiji said this, he saw Kawazoe Zenkyu's car behind them also drove up, just a moment later than them.

"Look, it's coming."

Hattori Heiji said this, and as Kawazoe Zenkyu's car drove up to him, the window on the back seat of the car was open. Xiaolan and Kazuha were sitting in the back seat. Seeing Conan and Hattori Heiji here, Kazuha was obviously a little surprised:
"Ah, Heiji?"

"He Ye? Why are you here?"

Hattori Heiji asked back, also a little surprised.

"Sorry about that."

At this time, Kawazoe Zenkyu, who was driving the vehicle, got out of the car and explained to Hattori Heiji:
"I was supposed to send them to the hotel, but because of things here, I came here..."

As she said this, Xiaolan got out of the car and said politely to Kawazoe Zenkyu:
"Don't be so polite, just ignore us and deal with the incident first!"

As they were saying this, they suddenly saw a man coming out from the corner. After seeing Hattori Heiji and the others, he waved at them and said:
"Ah! I found you!" (End of this chapter)