The 10th National Congress of the Communist Party of Vietnam () was held in Ba Đình Hall, Hanoi from 18 to 25 April 2006. The congress occurs every five years. 1,176 delegates represented the party's 3 million members. At the 13th plenum of the Central Committee, held before the congress, it was decided that eight members of the Communist Party's 9th Politburo had to retire. While certain segments within and outside the Politburo were skeptical, the decision was implemented. Because of party rules, the congress was not empowered to elect the general secretary, and it held a survey on whom the delegates wanted to be appointed General Secretary. The first plenum of the Central Committee, held in the immediate aftermath of the congress, re-elected Nông Đức Mạnh as general secretary. The congress is noteworthy because of the extent of democratization which took place within the party. The role of the Central Committee in decision-making was strengthened, and the role of the Politburo as a supreme organ was weakened. Inner-party accountability was strengthened. The Eighth Five-Year Plan of the Socialist Republic of Vietnam was approved at the congress, renewed its Marxist–Leninist credentials and emphasized the need to continue to improve the socialist-oriented market economy. Preparations Preparations for the 10th Congress were led by the Personnel Appointments subcommittee of the 9th Central Committee, probably chaired by General Secretary Nông Đức Mạnh. Mạnh worked closely with the Head of the Commission for Organization and Personnel to prepare a list of nominees for the election of the Central Committee at the upcoming congress. The 12th plenum of the 9th Central Committee, held in July 2005, laid down the principles for the Personnel Appointments subcommittee to work within: (i) quality of candidates in terms of qualifications and a "clean" CV (ii) reasonable distribution of candidates among different sectors and representations from among the population to ensure total Party leadership in all areas. After the 12th plenum, the Personnel Appointments subcommittee began discussions with important organizations and individuals within the Party, most notably with the Central Commission for Inspection (which investigates complaints against Party members), party elders Đỗ Mười, Lê Đức Anh, Võ Văn Kiệt, Võ Nguyên Giáp and Nguyễn Đức Tâm, and with the 9th Politburo. The nomination list created in these discussions had to be voted on by the 9th Central Committee. At its 13th plenum, the 9th Central Committee, several changes to the