The Central Committee of the Communist Party of China concluded a four-day plenum on Sunday, approving a political report to be unveiled at the Party's national congress slated for Thursday.

It also en-dorsed earlier decisions to expel two disgraced senior members from the CPC.

At the end of the seventh and the last plenum of the 17th Central Committee, Party leaders also approved proposed amendments to the CPC Constitution and agreed that "favorable grounds" have been laid and "full preparations" made for the crucial 18th National Congress of the CPC.

President Hu Jintao, general secretary of the CPC Central Committee, addressed the plenum, which was presided over by the Political Bureau of the Central Committee, according to a statement issued on Sunday.

Altogether, the Central Committee's 200 members and 165 alternate members attended the key meeting, with members of the CPC's Central Commission for Discipline Inspection — the Party's anti-corruption watchdog —and other leading officials of departments participating as non-voting members, according to a Xinhua News Agency report.

The statement said that Vice-President Xi Jinping, a member of the Standing Committee of the Politburo, made an explanation to the plenum on the draft report to the 18th Party congress and the draft amendment to the CPC Constitution.

The plenum agreed on the documents, both of which it decided will be submitted to the upcoming Party congress for review, according to the statement.

It, however, did not spell out what changes have been proposed for the Party charter.

Several professors with the Party School of the Central Committee of the CPC contacted by China Daily on Sunday night said they believed the amendment will encompass the Party's "latest theoretical innovations". They declined to elaborate.

The last time it was amended dates back to the 17th National Congress five years ago.

The plenum announced that the Central Committee had agreed on a decision made by the Politburo in September to expel Bo Xilai, former Party chief of Chongqing, from the Party for "severe disciplinary breaches".

Bo was stripped of Party membership on Sept 28.