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Xiao Chang raised his hand to interrupt, saying, "You are all Detectives, so I’m sure you can come up with various reasons why the deceased is not the murderer. In fact, I agree with those reasons. It is indeed difficult for an outsider to seal the door from inside with cement; note that it is difficult, not impossible. Everyone has seen foreign crafts like the Bottle Ship, right? The method of creating it is similar to how this locked room was achieved."
He set down his paintbrush and picked up a dry twig, gesturing in the sand: "When making a ship in a bottle, people first disassemble the ship into parts and then use tools like tweezers to perform very precise assembly operations through the narrow bottle opening. Only then can they create a complete sailboat. This shows that no matter how large or complex the object inside the bottle appears, as long as there is a small opening connecting to the outside world, with careful craftsmanship and appropriate tools, it can be done."
"In fact, the air vent is the 'bottle opening' of this locked room. The murderer only needs to use a suitable long trowel along with a long pipe for pouring cement; what seems like a complex task can still be accomplished. The minimally invasive surgeries popular in modern medicine share a similar principle! To be honest, I must admire the murderer’s superb masonry skills… but his intelligence is still limited."
Xiao Chang always had a knack for deconstructing things into several components, and he was particularly good at relating these components to his vast reservoir of knowledge. His erudition and unique way of thinking left a profound impression on Zhang Qiyan.
"I’m afraid that’s not correct!" Mu Rong Jing suddenly interjected with four words before falling silent, his long fingers unconsciously rubbing the sugar cube box in his pocket.
Ying Xiaoque cast an encouraging glance at Mu Rong Jing, signaling him to continue speaking; however, he remained as still as a statue. Xiao Chang also shot Mu Rong Jing an annoyed look before snorting softly and returning his focus to mixing paint.
Wu Yazhuo timely jumped in, waving his draft paper like a student showcasing their work in class: "Welcome to purchase Wu Yazhuo's new book — 'Mathematics World Is Truly Wonderful' — Through two calculations using the Pythagorean theorem, it’s clear that the tool Xiao Chang mentioned must be at least 4.6 meters long inside the room. A wooden tool over 4 meters long is difficult for an average person to operate easily, let alone a pipe filled with cement of that length, which would be incredibly heavy."
"But you haven't written 'Physical World Is Truly Wonderful'," Xiao Chang said with a rare smirk, teasingly. "Physics tells us about a principle called leverage."
"That’s possible. I know leverage can be used with the air vent; however, have you calculated how long the lever must extend outside for it to be easily operated by human strength? Moreover, operating from such a distance while observing such a dark interface would be extremely challenging," Wu Yazhuo replied while dramatically stretching out the line representing the tool in his draft paper until it nearly extended off the page.
Xiao Chang snatched the draft paper away and quickly sketched several interlocking gears and lever structures with a pencil: "The application of leverage doesn’t have to be so rigid: actually, using levers combined with cranks and gears along with materials like small cameras and computers to create a complex machine isn't that difficult."
Zhang Qiyan raised her hand like an attentive student: "Excuse me, but neither Ying sister nor I saw any signs of force on the window flower nor any spilled cement in other areas of the room."
"More importantly," Mu Rong Jing added as he adjusted his nonexistent glasses, "based on my calculations, the area of the window flower clearly does not support such complex lever operations. This means that if we were to try inserting a long stick now, before it could reach all parts of the door, it would already be obstructed by the narrow window flower." He pushed up his nonexistent glasses again. "My calculations are always precise; those who don’t believe can try it themselves."
Mu Rong Jing's calculations went unquestioned.
Ying Xiaoque lightly coughed, her cheeks flushing: "However, I think Xiao Chang's consideration of the window decorations is quite insightful. This is the only 'Judas Window' in this secret room. Inspired by him, I also thought of a possibility, but... I'm a bit shy to say it."
Zhang Qiyan clapped vigorously from the side: "Go ahead, there's nothing to be shy about; we're all just discussing here."
"Unlike what you usually encounter, I don't often deal with 'perfect crimes' or 'impossible crimes.' On the contrary, my detective experiences are filled with bizarre coincidences and convoluted cases. Therefore, I have always believed that chance and coincidence are crucial factors in solving cases, much like how some people attribute luck as part of their strength."
"Yes, I agree with this point. Our lives are indeed composed of one coincidence after another; it is the unknown of these coincidences that makes life so fascinating," Zhang Qiyan nodded repeatedly, his eyes filled with agreement.
The perspective of women is often quite intriguing.
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