Vietnamese martial artist became a world champion in 2013 . Duong trains seven days a week , seven in build up to competition . Sport of fighting derived from ancient Chinese martial art . `` From a performance aspect , it 's almost comparable to gymnastics -- He displays incredible skill in routine that uses sticks and swords .
Vietnamese martial artist became a world champion in 2013 . Duong trains seven days a week , seven in build up to competition . Sport of fighting derived from ancient Chinese martial art . He displays incredible skill in routine that uses sticks and swords .