Strop: also known as the "speed" and "speed" and "trapeze". The earliest for alpine and military raids. After the self evolution of recreational projects, is a challenging, stimulating and entertaining modern sports recreation projects. It can cross the grasslands, lakes, rivers and canyons, and glide down at higher speeds with the help of height difference. Make visitors feel the excitement and satisfaction in the near misses happiness, so won the tourists, especially among young people.