BEIJING, Nov. 16 (Xinhua) -- A seminar on how to improve China's multi-party cooperation and political consultation mechanism under the leadership of the Communist Party of China (CPC) opened here Tuesday.

The seminar was held by the Chinese People's Political Consultative Conference (CPPCC) with the attendence of 251 national political advisors.

Jia Qinglin, chairman of the CPPCC National Committee and a member of the Standing Committee of the Political Bureau of the CPC Central Committee, met with the 251 advisors.

Wang Gang, vice chairman of the CPPCC National Committee, told the participants to the seminar that the top political task of the CPPCC for now and a future period is to study and implement the guiding principles of the 5th plenum of the 17th CPC Central Committee, which concluded last month.

The seminar will last four days.