(VLR) July 28, 2020 marked a quarter-of-century time Vietnam officially joined ASEAN- Association of Southeast Asia Nations. Joining ASEAN was a breakthrough step of Vietnam, forming the basis for international integrations, globalization and free trades. After a quarter of a century joining ASEAN, regional cooperation relationship among Vietnam and ASEAN countries is getting comprehensive and have great impacts on Vietnam’s socio-economic and political life, contributing in improving Vietnam’s positions in regional and the world’s cooperation forums.