Several plenary sessions were held after the Party Congress, such as the Eighth Plenary Session of the Eighth Central Committee and the Eighth National Congress.
The purpose of the meeting is simple, that is to say:
Party Congress: held regularly to sum up experience, formulate the principles and policies of the new party, and elect the new leader of The CPC Central Committee.
Plenary session: held irregularly to summarize and deploy the Party's work and form resolutions. ....
And their difference and connections with people's congress:
The people's congress is the highest authority of the country and is attended by the National People's Congress. ...
The party congress is the highest authority of the whole party and is attended by party representatives. ...
The connection is very extensive. .....