The moment Su Yiming won the gold medal in the men's Olympic Big Air event on Tuesday, a great cheer went up from a group of skiers who were training at Tiger Ridge Mountain Park in the Changbai Mountain Scenic Area in Jilin province. Since the winter of 2018, Su, who also won silver in the snowboard slopestyle competition at the Beijing Games on Feb 7, had spent three consecutive ski seasons training at the park. The park opened in 2018 and has world-class training facilities and compet...