Conan: The Mechanic

After returning home, Chiba finally asked Haibara Ai the question he was puzzled by.

"You were afraid before? What's going on?"

"..." Haiyuan pursed her lips and did not answer.

"..." Qian Yu felt unease in her heart. Haibara Ai had no plans to say at all, but Qianyu couldn't be ruthless to drive out Haibara Ai. so. . .

So Chiba decided to give her house a high-strength weapon.

"You don't want to say...then don't say..." Qianyu sighed. "I will arm the house as soon as possible and prepare for defense."

Haibara Ai lowered her head and said nothing—if there was stubbornness in her expression before, now her expression is more of guilt, not being able to tell the truth to Qianyu. (Of course, Chiba can't see it)

At this moment, the phone rang - it was Dr. Agasa's call.

As expected, as Fujiwara said, Dr. Agasa invited all the members of the Detective Boys to go with him to a hot spring hotel in the suburbs the next day.

"After we get there, do we still need to help the guy named Fujiwara monitor that girl?" Haibara Ai asked Qianyu as she hung up the phone.

"It's not a good habit to take a task and not do it," Qianyu shrugged. "But if the task is too excessive, we can completely refuse the task on judicial grounds."

"That's right." Haiyuan Ai nodded.

"Then I'll go make dinner for you first?" Qian Yu stood up and walked to the kitchen. "What do you want to eat?"

"Frozen dumplings..." Haibara Ai said softly after hesitating for a while. "This is easier to do..."

"Okay." Qianyu walked to the refrigerator and took out the quick-frozen dumplings.

"I'm sorry..." Haibara Ai turned around and murmured in a volume that only she could hear. "I'm really sorry..."

. . .

The next morning, a Beetle was driving down the road.

"Hakone Onsen?" Ayumi asked curiously. "where is that?"

A strange color flashed in Qianyu and Conan's eyes.

"Ayumi, don't you know Hakone Onsen?" Mitsuhiko was surprised. "That's the home of hot springs!"

"Can you give me a detailed introduction?" Haibara Ai tilted her head and looked at Qianyu. "I don't understand this."

"Hmm..." Qian Yu thought for a moment. "Hakone is part of the Mount Fuji Scenic Area and is located in the southwest of Kanagawa Prefecture. The main attractions are Hakone Seven Hot Springs—the seven most famous hot springs in the Hakone area during the Meiji era—and Hakone Bali, among others."

"There is also a delicious food over there!" Dr. A Li said with a smile.

"Food?" Even Qianyu looked at him in surprise.

"Hei Yuzi who prolongs life by seven years! According to legend, eating a black egg can prolong life by seven years!" Conan reminded. "This is a specialty of Owakudani!"

"I knew about Kuroyuko before, but I didn't know that it was here..." Qianyu shrugged. "By the way, I remember because Kuroyuko is boiled in hot springs, so the yolk is more delicious than ordinary eggs?"

"Yes," Dr. Li nodded. "The lake view hotel we went to is near Wakudani. If I remember correctly, there should also be a small hot spring that can cook black jade. We may be able to buy some directly there and taste it... I suddenly remembered a riddle, everyone. Guess what?"

"?" Everyone looked at Dr. A Li.

"The top is the flood, and the bottom is the fire. What's the answer?" Dr. A Li asked.

"Uh..." Qianyu and Conan both reacted immediately. "Doctor, is this too simple?"

"It's the hot spring!" Genta, Ayumi, and Mitsuhiko all gave their answers right away.

"That fire isn't quite right?" Haibara tilted her head. "Most hot springs are produced by underground magma heating flowing water, but what is the relationship between underground magma and flames?"

"But it looks very similar." Qianyu pouted. "Although it doesn't really matter at all..."

"Is magma related to fire?" Yuan Tai, who was in the passenger seat, turned around and asked curiously.

"Magma is mainly composed of melts of silicates and metal oxides, and they are all solids themselves, and have nothing to do with flames." Haibara said lightly.

"But the lava is red!" Ayumi asked. "Isn't that a flame? If there is no flame, how can there be that color?"

"The color of the magma itself is different at different temperatures..." Qianyu spread her hands. "Above 475 degrees will appear red; above 550 degrees will be dark red; above 700 degrees will be bright red; above 900 degrees will be orange; above 1090 degrees will be golden yellow; and magma above 1150 degrees will appear white. At higher temperatures, blue or even purple magma will appear - but the magma that can reach 1875 degrees Celsius under normal pressure has long since disappeared, and only relics such as komatiite can prove its existence. "

"Why did he disappear long ago?" Ayumi asked.

"Over time, the mantle is cooling, and only magma billions of years ago could reach that temperature at atmospheric pressure and form komatiite. In the same process now, only much cooler magnesia can be formed. (The domestic translation is picrite, but the word itself comes from the Japanese "magnesium", which is kaodao, so this story in Japan chooses to respect the original meaning of the Japanese (wiki data shows that the temperature of the Komati magma is 1600 degrees Celsius , but in 1989 CampbellI·H's paper stated that the temperature of the Komati magma was 1875 degrees under the condition of 0.99 times the atmospheric pressure. , so take that. Plus, according to the same paper by Campbell, the temperature of picrite is 1425 degrees Celsius.)

"Then why does the mantle cool?" Ayumi asked again.

"To dissipate heat to the surface..." Qian Yu replied. "Although it's a very slow process, heat from the mantle and core does continue to be transported to the surface—but the process is so slow that the temperature of the mantle and core doesn't change until the sun becomes a red giant and devours the planet. It's going to drop too much."

"Qianyu is so knowledgeable..." Mitsuhiko sighed.

"Don't make fun of me!" Qian Yu waved his hand with a wry smile. "I just happened to see that paper, how could I have known these things if I hadn't read the paper that Campbell published!"

"Well, it's in front!" Dr. Li said suddenly happily. “Lake Look Inn!”

In front, the main hotel building with a height of six or seven floors occupies the end of the field of vision.

"You actually call yourself a hotel..." The corners of Qianyu's mouth twitched. "This scale can be used as a hotel in a grand manner..."

"This hotel has just been expanded for a few years. The Lakeview Hotel was very small before!" Dr. A Li explained with a smile.

"Doctor, are you familiar with the owner of this shop?" Conan asked curiously.

"I was a classmate in college, but he inherited the hotel after graduation, and I continued to study for my degree, and we parted ways. But during college, I was invited to the hot spring many times by him!"

In the sound of everyone talking, the Beetle drove into the parking lot.