The Political Bureau (Politburo) of the Chinese Communist Party (CCP) Central Committee held a special two-day meeting on December 28 and 29. At the meeting, Xi Jinping brought up the names of five disgraced top officials: Zhou Yongkang, Bo Xilai, Xu Caihou, Guo Boxiong, and Ling Jihua. Except for Ling, a former CCP Central Committee member who served as the top aide to then CCP Secretary General Hu Jintao, the other four were all former Politburo members. Zhou was also a member of the Politburo Standing Committee.
A news release issued after the meeting claimed that punishing these officials served to honor the responsibility to the CCP, to the country, to the people, and to history.
Xi was quoted as asking current Politburo members to "stay in line" with the CCP Central Committee, and to "be strict in educating and supervising their children and other family members as well as their subordinates."
VOA‘s report observed that asking Politburo members to "stay in line" with the CCP Central Committee (or Party Central, in short) is worth noting, as the Politburo itself is the power center of 80 million CCP members. Xi’s requirement would imply that the 20-plus Politburo members need stay in line with either the Politburo Standing Committee or with Xi himself.
Source: VOA Chinese, December 30, 2015