Li-Ning Windstorm N77-II: As used by Bao Chun Lai . The anti-torsion performance of strokes is improved under high tension conditions and brings about a quick, exact and stable second stroke. The name WINDSTORM is inspired from the four character proverb in Sun Tzu s Art of War: When in movement, be as swift as the STORM. When in slow marches be as majestic as the WOODS. When in aggression be as fierce as the FLAME. When in stillness be as firm as the ROCKS EXTRA SKILL Series is a good tool for smart players. Most of them prefer racquets with light frame and soft shaft. With the integration of exclusive Li-Ning technology such as Aerotec Beam System, the air resistance is reduced tremendously. This enables the player to manoeuver the racquet with ease. SHAFT TECHNOLOGIES: BIO INNER CONE : The breakthrough concept of inner cone shaped racquet shaft shifted the bending points upwards to improve precision when attack. UHB SHAFT: Ultra slim and elastic racquet shaft with unique frontal bending points is achieved by using the R&D data collected from professional badminton players over the years. It optimizes the players performances especially during drop shot attack. FRAME HEAD TECHNOLOGIES: WING STABILIZER : The unique characteristics of metal memory and aviation mechanism prevent deformation and excessive vibration during hitting, therefore allowing the player to control the strokes with precision. AEROTEC BEAM SYSTEM : Li-Ning s beam is established through numerous R&D tests and advance calculation system to achieve the reduction in air resistance and produce a higher strength in racquets. DYNAMIC OPTIMUM FRAME : Isometric frame equalises the tension on the string bed, enlarging the sweet spot for effective and consistent hits BOX TYPE FRAME : Box typed frame improves both stability and power of the racquet HDF SHOCK ABSORPTION SYSTEM : High tech shock absorption material is injected into the racquet. HDF shock absorption material is extremely light in weight, with high shock absorption capacity. It reduces the stress and impact to the wrist and arm to prevent injury hitting. MPCF REINFORCING TECHNOLOGY : The racquet is strengthened by multi-layered carbon fiber in all-rounded way. With the exquisite hand work by skilled racquet specialists, the racquet is further reinforced at specific points to improve the overall feel and strength. Ti - 3G ( TITANIUM EXTRA ELASTIC ) : The frame from point 3 and 9 o clock and above is made of ultra elastic 3G Titanium alloy. The distinguished feature of metal memory will control the frame restroration precisely at the moment of deformation and restrain the shake resulting from vibration waves. The anti-torsion performance of strokes is improved under high tension conditions and brings about a quick, exact and stable second stroke.LI Ning is world’s renowned firm in the field of sports equipment design and development. In the area of Badminton, Li Ning has developed world class racket and badminton accessories to support the top class badminton players. World number 1 Lin Dan is endorsed by Li Ning , in fact most of the top seeded badminton players are endorsed by Li Ning Badminton team. Li Ning shoes are very popular among the badminton player because of its excellent bounce, cushioning, shock absorption and breathability. As a leader in the worldwide market, their name is a trusted brand by numerous badminton stars. Millions of loyal customers prefer their products as far as badminton is concerned.