The Kunlun Mountains stretch across thousands of miles and are lined with ice peaks. The cold wind is like a knife, and the blowing on your face is like being polished with sandpaper, causing pain and bone-piercing pain.
At the border line, which is 4,000 meters above sea level, the air is so thin that it seems to break with a pinch. The oxygen content is less than 60% of that in the plains. Ordinary people are out of breath even when walking normally here. But for the "Sirius" task force of the Chinese People's Liberation Army border defense stationed here, this is their battlefield and the red line of the country they guard with their youth and blood.
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