Ye Jianying
Cao was born in Pingshan County, Hebei. He once served as a bodyguard to Marshall Ye Jianying and took part in the coup which ousted the Gang of Four in 1976 after the death of Mao. He was named the executive deputy director of the CSB in 2006, then elevated to director in 2007. He was appointed deputy commander of the Beijing Military Region in March 2015.