A breathtaking high-altitude slackline competition began Monday in Zhangjiajie City, Hunan Province, bringing together more than 20 top slackliners from around the globe to compete for the championship. Now in its eighth year, the event has been held annually since 2018 and has become a signature attraction of Zhangjiajie National Forest Park. Athletes from 10 countries—including China, France, Germany, and the United States—dazzled spectators with gravity-defying stunts as they balanced on a sl