Wu Yongning, known as “China’s first rooftopper,” was a young social media star famous for his daring, often life-threatening stunts on the edges of skyscrapers. In November 2017, he attempted one of his riskiest feats yet, performing pull-ups off the side of the 62-story Huayuan International Centre in Changsha, Hunan province. Tragically, he lost his…