A bronze vessel - like tripod was found at Tu Nghia (Quang Ngai) with 13 decorative sun rays at the bottom and animal-like human head on the three legs. From this tripod with bronze artifacts and other items, which were found in the Dong Son - culture area, especially in the mountainous areas Thanh Hoa - Nghe An provinces, the author presents the cultural mixture in the decorative style on the bronze artifacts from the northern Dong Son (Tay Au / Tay Vu) such as the style of Ban Chieng bronze artifacts (Thailand) other sources of data also demonstrate the cultural interaction between Ban Chieng and other Metal age cultures from Laos, Cambodia and the Central Viet Nam, which is fairly clear. This indicates the status of multi - nations, multi - cultures, multi - national minors as well as our interaction occurring in the proto - prehistory evolution of Southeast Asia.