Complex sentence: Zhou Yongkang (born December 1942) is a retired senior leader of the Communist Party of China (CPC) who served on the 17th Politburo Standing Committee (PSC), and the head of the Central Political and Legislative Committee between 2007 and 2012.
Split into simpler sentences: Zhou Yongkang (born December 1942) is a retired senior leader of the Communist Party of China (CPC). He served as a member of the elite 17th Politburo Standing Committee (PSC), China's central decision-making body, as well as the head of the Central Political and Legislative Committee between 2007 and 2012.