I. Full Member States

1. Poland, Czech Republic, Slovakia, Hungary (Core Four Central European Countries)

2. Estonia, Latvia, Lithuania (Baltic Three)

3. Romania, Bulgaria (Southeastern European Danube Countries)

4. Slovenia, Croatia, Serbia, Bosnia and Herzegovina, Montenegro, North Macedonia, Albania (Balkan Countries)

5. Greece (Included in the China-CEEC Cooperation Framework, fully corresponding to the cooperation agreement)

II. Observer Countries

Belarus, Austria, Switzerland