2. The first is the aerial skills of freestyle skiing. This technique is similar to vault in gymnastics. Players are required to perform difficult movements from takeoff to landing. The referee scored according to the difficulty of taking off, jumping in the air and landing.
3. Secondly, the troubleshooting skills of freestyle skiing. In obstacle tracking, four players need to cross different obstacles. Whoever reaches the finish line first will win. It's a bit like 100 meter hurdles.
4. Next is the skill of freestyle skiing U-shaped course. There are special provisions in the standards for U-shaped Olympic venues. Participants kept spinning and jumping in the U-shaped field, making difficult moves and getting marks from the judges. A high score means victory.