Li-Ning Flame N50 badminton racket is equipped with slim frame and hih-tensile shaft that granted the racket low air resistance and reinforced strength. Using isometric head shape and wave-like groove frame structure, the string repulsion is increased and vibration is reduced to avoid injuries. Li-Ning Flame N50 badminton racket is taylor-made of Fu Haifeng, one of China national team and world top ranking and 2008 Olympic Silver Medalist men doubles badminton players winning the World Championship in 2006 & 2009, All England in 2005 & 2009, and Asian Games in 2006. The racket name “Flame” came from the adage in Sun Tzu Art of War that stated, “When in movement, be as swift as the storm. When in tactics, be as intricate as the woods. When in aggression, be as ferocious as the flame. When in stillness, be as steady as the rocks”.