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Xiao Chang raised his hand and interrupted, "You are all renowned 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's quite difficult for an outsider to seal the door from inside with cement; note that it's difficult, not impossible. Have you all seen the foreign craft known as 'ship in a bottle'? The technique used to create 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 through the narrow bottle neck. Only then can they create a complete ship. This shows that no matter how large or complex the object inside the bottle appears, as long as there is a small opening connecting it to the outside world, with careful craftsmanship and appropriate tools, it can be done."
"In fact, the air vent is the 'bottle neck' 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 complicated task can still be accomplished. The minimally invasive surgical techniques popular in modern medicine are quite similar to this method! To be honest, I have to admire the murderer's exceptional masonry skills... but their intelligence is still limited."
Xiao Chang always had a knack for deconstructing things into several units, and he was adept at relating these units 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 right!" Mu Rong Jing suddenly interjected with four words before falling silent again, her slender fingers unconsciously rubbing the sugar cube box in her pocket.
Ying Xiaoque cast an encouraging glance at Mu Rong Jing, signaling her to continue speaking; however, she remained as still as a statue. Xiao Chang also shot Mu Rong Jing an annoyed look and snorted coldly through his nose before returning his focus to mixing oil paints.
Wu Yazhuo timely jumped in, waving his draft paper like a student presenting their work in class: "Welcome to purchase Wu Yazhuo's new book — 'The Wonders of the Mathematical World' — Through two calculations using the Pythagorean theorem, it's clear that the tools Xiao Chang mentioned would need to be at least 4.6 meters long inside the room. A wooden tool over 4 meters long is not easy for an average person to handle, let alone a pipe filled with cement of that length, which would be incredibly heavy."
"But you haven't written 'The Wonders of the Physical World'," Xiao Chang said with a rare smirk at the corner of his mouth, teasingly adding, "Physics tells us about a principle called leverage."
"That could work. I know leverage can be applied using the air vent, but have you calculated how long the lever must extend outside for it to be manageable by human strength? Additionally, operating from such a distance while observing such a dark interface would be extremely challenging." Wu Yazhuo exaggeratedly stretched out the line representing the tool on 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: in fact, using levers combined with cranks and gears along with materials like small cameras and computers to create a complex machine isn't very difficult."
Zhang Qiyan raised her hand like an attentive student: "I'm sorry, but neither Ying nor I saw any signs of force on the window flower, nor did we see any spilled cement inside other areas of the room."
"More importantly," Mu Rong Jing pushed up her 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 extending a long wooden stick inside now, it would already be broken by the narrow window flower before reaching all parts of the door." "My calculations are always precise; if you don't believe me, you can try it yourself."
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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