On May 22, 2021, 21 runners died and eight were injured in a 100-kilometer mountain race at the Yellow River Stone Forest in Baiyin, Gansu. In early June, the General Administration of Sport suspended, “from today,” mountain trail running, Gobi crossings, wingsuit flying, ultra-long-distance running and other “emerging high-risk sports events with unclear management responsibility, imperfect rules and unclear safety standards.”