Xiao Yi gently unsheathed his Polaroid camera and, with the mysterious grace of a magician, began meticulously photographing the map. With each click of the shutter, the map's intricacies and mysteries seemed captured, transformed into vivid, authentic images. Smiling, he handed each photo to each of us, as if offering a guiding light, illuminating the path ahead and preventing us from getting lost in this vast unknown. In that moment, we felt Xiao Yi's attentiveness and care, and cherished this precious journey of exploration all the more. In this mysterious cave, a breath of fresh air greeted us, transporting us to a paradise untouched by the world. The stone walls within, smooth as a mirror, felt far from cold and impersonal, instead evoking a sense of tranquility and remoteness. Here, free from the hustle and bustle of the world, only the tranquility and purity bestowed by nature.

Yet, it is precisely these smooth stone walls that offer the cave's most unique beauty. In the dim light, they gleam with a profound radiance, like an unopened history book, silently recounting eons of history and stories. Each line of stone seems to tell an ancient and mysterious tale, drawing the eye to explore its mysteries.

This cave is not only a natural wonder, but also a mysterious world filled with stories. It allows us to appreciate the wonder and beauty of nature and feel the weight and depth of history. In this tranquil and mysterious world, we can almost touch the traces of time and feel the rhythm of life.

The solutions everyone offered were simple and practical: ventilation was the first thing to do. Ventilation isn't just about oxygen levels; it's about our quality of life and health. Imagine living in a stagnant environment for extended periods of time. Wouldn't we be like smoked bacon?

Solving ventilation problems is like solving a puzzle. We need to consider a variety of factors, especially the flue. The flue is like the airway in our respiratory system, carrying the vital task of removing waste gases and bringing in fresh air. A problem with the flue is like a blocked airway, with disastrous consequences.

Therefore, solving ventilation problems requires not only focusing on oxygen levels but also ensuring the smooth flow of flues. Only by ensuring unobstructed airflow can we avoid the fate of "smoked" bacon and enjoy a healthy and comfortable living environment. To achieve this goal, we need to utilize a variety of tools and techniques to comprehensively enhance the performance of ventilation systems, bringing vibrant life to living spaces. Once these two issues are addressed, the rest will be easier. This elevated terrain offers a natural retreat. By drilling holes closest to the mountain's outer edge, we cleverly ventilate smoke and ventilation, making the process imperceptible. It's like gently brushing under the feet of a giant, leaving no trace. This design not only demonstrates our respect for the environment but also demonstrates the magic of technology. We enjoy the convenience of technology while also protecting this beautiful land. Laying pipes is no joke; it requires meticulous planning and a massive undertaking. However, faced with the overall elliptical shape of the cave base, we were inspired to create a unique cross-shaped ventilation main duct. This design not only solves the ventilation problem but also imbues the cave with a mysterious and sacred beauty. It seems to remind us that every difficulty has a solution, and if we seek diligently, we will always find that ray of light. The chimney is designed to wrap around two sides, like a gentle mother, tightly embracing the accommodation area. This layout not only ensures proper ventilation in the accommodation area but also creates a warm and intimate atmosphere. It seems to remind us that no matter how busy life may be, home will always be our warm harbor, providing solace and strength amidst fatigue.

For those of us who have struggled through the extreme cold, the shadow of its chill remains a lingering fear. Faced with the challenge of extreme temperatures, we rely even more on that most primitive form of warmth: fire. It not only brings us warmth, but also ignites a light of hope, giving us the strength to move forward amidst the bitter cold. Fire, like the flame of life, burns within us, illuminating our path forward.

The importance of the flue is self-evident; like blood vessels in the human body, it delivers the oxygen we need for life. However, even seemingly daunting tasks pale into insignificance in the face of this treasure team. This team possesses exceptional wisdom and exceptional skills. With a fearless spirit, they tackle every challenge, transforming the impossible into reality. In their hands, the design and installation of the flue will become a perfect work of art, showcasing limitless possibilities and charm. In Xiao Yi's mind, a beautiful painting slowly unfolds. He begins to contemplate the room's decor, imagining the placement of each item, like an artist creating a masterpiece. He immerses himself in his conception, meticulously experiencing every detail, allowing them to radiate in his mind. Through clever rhetoric, Xiao Yi transforms the once mundane placement of objects into something vivid, engaging, and captivating.

During the colder months, bedroom comfort is particularly crucial. Rather than seeking spaciousness, choose a cozy and inviting nook. Overly large rooms not only struggle to maintain warmth but also allow cold winds to penetrate. Therefore, choosing the right bedroom size and effectively utilizing space to create a warm haven is key to surviving the colder months. Let's escape the annoyance of large spaces and embrace a cozy and comfortable bedroom, experiencing its unique warmth and tranquility. On their journey of exploration, the group resolutely chose the winding passage. Each step was filled with uncertainty and wonder, like stepping into a mysterious fantasy world. Every turn in the passage was a breathtaking experience. Finally, their view opened up, revealing a vast, spacious cave.