A slackline competition was commenced at Zhangjiajie National Forest Park, C #China's Hunan Province, on Monday, seeing 20 elite slackliners from 10 countries – including China, #France, #Germany, and the #UnitedStates – undertook the breathtaking challenge of walking a kilometre-long line suspended at an altitude of 1,092 meters atop the peak. At the competition site, athletes from around the world took turns walking the highline as effortlessly as if on solid ground, with many showcased impres