The race to buy high-altitude challenge , in a700 m long , 39-degree slope up to walk a tightrope , which is the world 's most high-altitude limit of the steep slope .
赛买提此次高空挑战，是在一条长达700米、坡度达39度的钢索上行走，这是世界上最陡的高空极限坡度。
A700