Deep within the mine, the dim light of the flashlight was gradually swallowed by the toxic mist, and the air around them grew heavier, making even breathing feel like a luxury.
Leng Fengyang felt anxious, but as the leader of the team, he knew he had to remain calm and look for a glimmer of hope. Just then, a faint blue display panel appeared before him, and that familiar sensation made it hard for him to hide his excitement. The portable system that had been disabled for three days finally restored its prompts.
The system emitted a rapid and clear voice.
"Environmental crisis detected. Emergency protocol activated. Please note that the oxygen levels in the current area are rapidly declining, and the concentration of toxic gas is continuously rising. It is advised to seek shelter or take emergency measures immediately."
Leng Fengyang's eyes brightened. With a thought, he quickly activated the system's advanced scanning mode, hoping to find an exit from the mine as soon as possible.
"The system is analyzing the surrounding terrain to locate the nearest Safe Zone or possible escape routes."
Soon after, a three-dimensional terrain map appeared on the faint blue panel, marking several potential shelter locations. One of them was closest to them, located in a branch of an abandoned mineshaft deep within the mine, where there were rumored to be emergency shelters.
Leng Fengyang made a decisive call: "A Yan, Lao Luo, follow me! The system indicates there's a shelter that way!"
The three of them navigated through the winding and complex tunnels with only their weak flashlight beams to guide them. Each step was fraught with danger, but Leng Fengyang's System Prompt acted like a lighthouse, guiding them forward.
Along the way, they had to dodge several cave-ins caused by toxic gas erosion and sudden surges of underground water. Each time was perilous, but with unwavering faith and mutual support, they turned each danger into safety.
Finally, in a nearly forgotten corner, a rusted iron door appeared before them. The words "Emergency Shelter" were barely visible in red paint on the door.
With all his strength, Leng Fengyang slowly pushed open the heavy iron door. A rush of cool and slightly damp air surged in instantly, like rain after a long drought; it was a breath of fresh air they had long missed.
The three of them almost tumbled into this small space, quickly shutting the door behind them to firmly isolate themselves from the deadly toxic mist and suffocating crisis outside.
"We've finally escaped for now."
Leng Fengyang let out a long breath, his tone revealing an unmistakable weariness and relief as he turned his gentle gaze toward A Yan and Luo Shanhe.
Their eyes met in the dim light, each reflecting relief and warm smiles that conveyed an understanding deeper than words could express.
However, this peace did not last long; Leng Fengyang quickly reined in his smile as his expression grew serious.
He knew that while this temporary shelter provided them with refuge, their predicament of lacking water and food hung over them like a sword ready to drop at any moment—constantly reminding them that they needed to move quickly.
Moreover, they still did not know how to exit the mine. If they could not find a way out soon, they would face even graver survival challenges.
"To find an exit, you must complete a Sudoku puzzle to open this door, and you only have three chances."
"The Sudoku is beyond System Prompt's capabilities."
The System Prompt provided this answer when Leng Fengyang pressed for more information.
It seems we can only rely on ourselves now.
Leng Fengyang stood in that dim and narrow space, the weak light source in his hand flickering, barely illuminating the stone wall covered in a complex grid of numbers. His heartbeat quickened involuntarily, each pulse a struggle against the limits of fate. This was not just a simple Sudoku game; it was their final barrier to freedom and hope.
A Yan stood beside Leng Fengyang, her bright eyes shining with determination in the gloom. As the brains of the team, she quickly assessed the arrangement of numbers on the Sudoku board, rapidly constructing a framework for solving the puzzle in her mind. "We need to work together. Lao Luo, you handle marking the numbers that are confirmed beyond doubt. I'll analyze the possible combinations, and A-Feng, you'll verify our hypotheses to ensure every step is accurate."
Luo Shanhe immediately sprang into action upon hearing this. His rough yet nimble fingers danced across the stone wall as he drew a knife he had scavenged from his waist, gently outlining the contours next to the numbers to record those that had been ruled out.
Leng Fengyang occasionally gazed at the Sudoku panel, his eyes glinting with challenge, while at other times he bowed his head deep in thought. Relying on his memory and meticulous logical reasoning, he wove a numerical compass in his mind, continuously deducing various possibilities. Each hypothesis proposed by A Yan was a condensation of her brilliant insights, while Leng Fengyang calmly evaluated and precisely judged its potential for verification.
The first two attempts were like fleeting meteors across the night sky—brilliant yet unable to guide them through their encirclement. However, after relentless effort and careful adjustments during the third attempt, the last piece of the Sudoku puzzle was finally filled with the correct number, as if the riddle of their entire world had found its answer at that moment.
With a crisp and pleasant crack, it seemed as though magic had been cast upon the stone wall as it slowly retreated to either side, revealing a narrow passage filled with hope before them.
The exit of the mine had opened, but it was surrounded by rotting corpses. Just as excitement surged through the three of them, this System Prompt echoed in Leng Fengyang's ears. His expression changed abruptly; the joy of breaking free was instantly replaced by a chilling reality. Those damned corpses were waiting at the entrance to make a meal out of them.
Luo Shanhe's roar reverberated through the deep mine, his voice woven with anger at this cruel end and profound despair over their current predicament. Each word was a silent accusation against this apocalyptic wasteland and a struggle against unwillingness. Having fallen to this point, every second felt like struggling in an abyss; now that they had finally glimpsed a glimmer of opportunity, they were blocked by these corpses again, plunging his mood into a cold abyss.
"Lao Luo, how many bullets do we have left?" Leng Fengyang's voice was steady and resolute; he knew that lingering here was tantamount to slow suicide. "We can't just sit here and wait for death; we need to find a way to fight our way out!"
A sense of determination surged within Leng Fengyang; he understood that since the bright exit was so close at hand, even if the path ahead was filled with terrifying hordes of corpses, he had to muster all his courage and vow to carve out a way forward.
Luo Shanhe sensed his resolve and gently patted his backpack beside him with unwavering eyes. "The ammunition we have is enough to hold off at the entrance, but once we hit the ground, close combat will be unavoidable."
A Yan furrowed her brows upon hearing this; concern was evident on her face. "Without tank support, such a move is undoubtedly all or nothing. Those corpses may lack consciousness, but their strength is astonishing—comparable to that of robust adults. How can just the three of us withstand their overwhelming assault and make it out alive?"
Her concerns were not unfounded; after all, in the face of such a stark disparity in power, any hope seemed exceedingly faint.
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