Complex sentence: After the fall of the Gang of Four, Dai returned as director, and the ballet company began to reform and change direction with the classical Western ballets resurrected, and also broadened its range to include more modern ballets from around the world.
Split into simpler sentences: After the fall of the Gang of Four, Dai returned as director, and the ballet company began to reform and change direction with the classical Western ballets resurrected. It and also broadened its range to include more modern ballets from around the world.