이번 9·9절 계기 집단 체조에는 드론(무인기), 레이저, 영상 기술 등 다양한 최신 기술이 동원됐다고 전해진다.
It is said that a variety of the latest technologies such as drones (unmanned air vehicles), lasers, and imaging techniques were mobilized in group gymnastics on this September 9 National Day.