The 4th Congress introduced the "New Economic Mechanism" (NEM, market reforms).
[1] Due to the party's secret nature, it's hard to discern the work and the political intrigues which takes place before the congress.
[1] In the run-up to party congresses, outside observers try to discern factional intrigues, usually between two supposedly "pro-Chinese" and "pro-Vietnamese" or "pro-reform" and "anti-reform" camps.
[1] Despite this, there seems to be broad agreement within the party on the path its pursuing: that is, creating a socialist market economic model and attracting foreign direct investment.
[4] Information on congresses, number of delegates, number of people elected to CCs, party membership, the individual who presented the Political Report and information on when the congress was convened can be found in these sources: Articles and journals: