藏北无人区 ,一片充满恐怖、艰险的广袤荒原。这里平均海拔５０００米以上 ,空气含氧量仅有内地的４７ % ,号称“地球第三极”。高寒缺氧 ,泥石流袭击 ,狼群出没 ,使不少探险者望而生畏。中国著名探险家余纯顺“远征”此地时 ,脸色青紫 ,腹胀如鼓 ,只感“死亡在前” !笔者曾随 No man’s land in northern Tibet, a terrifying, dangerous and vast wasteland. Here an average of more than 5,000 meters above sea level, the air oxygen content of only 47% of the Mainland, known as the “third polar planet.” Alpine hypoxia, debris flow attacks, wolves haunt, so many explorers daunting. The famous Chinese explorer Yu Chun-shun “expedition” here, his face bruising, abdominal distension as drum, only “death in front!” I have with