Lining ss 9 iii badminton racket the li-ning super series is built for unrivalled agility with a carbon fiber. Crafted for defending and mature players. Racket technology high tensile slim shaft aerotec-beam system dynamic-optimum frame full high carbon graphite balance point - 300 mm aerotec beam system with support of advanced calculation system, the rackets are made with extreme low air resistance and high intensity to enable the players’ performance in various ways. The rackets fit into different players are all resulted from aerodynamic design. Through unrelenting tests, and the strategies that targeted at different playing, the supportive data is accumulated, li-ning beam system is thus established. Dynamic-optimum frame all-round optimized design improves racket mechanical structure for more efficient attack and defense system. The sweet point extends upward and the hitting point is moved higher. The effective defense area is enlarged for severe smash by dynamic-optimum frame. The hitting velocity is improved considerably with widened stringing area and increased bounce strength.