Complex sentence: Upon his retirement, Rashid was appointed as national coach by the Badminton Association of Malaysia and became instrumental to the success of the new generation badminton players (for instance Daren Liew and Chong Wei Feng).
Split into simpler sentences: Upon his retirement, Rashid was appointed as national coach by the Badminton Association of Malaysia. He became the instrumental to the success of the new generation badminton players (for instance Daren Liew and Chong Wei Feng).