April 16, 2021 - April 19, 2021 - Cuba, Havana CP of Cuba, 8th Congressof the Communist Party of Cuba (PCC)

April 24, 2021 - April 25, 2021 - Russian federation RCWP - CPSU, 12 (22) Congress

April 24, 2021 - April 24, 2021 - Russian Federation CPRF, XVIII Congress of the CPRF

May 13, 2021 - May 16, 2021 - Stockholm, Sweden CP of Sweden, 38th Congress of the Communist Party of Sweden

June 24, 2021 - June 27, 2021 - Athens CP of Greece, 21st Congress