Sa Huynh cultural relics are widely distributed in Vietnam's Central region and its Central Highlands, with a dense concentration in coastal areas in the provinces from Quang Nam, Quang Ngai to Khanh Hoa and Ninh Thuan. This is an indigenous culture in Vietnam in the era of the Metal Age dating from the first millennium BC to the 1st-2nd century AD. Along with Dong Son culture in the northern, and Oc Eo culture in the southern part of the country, Sa Huynh culture has been considered among Vietnam's traditional cultures. Adapting to the sea environment has always been a prominent feature of the culture. Living in a dynamic and open environment, Sa Huynh culture residents had wide exchanging and trade relations with those in the mountainous areas of the Central Highlands, as well as in the southwestern delta and Southeast Asia, especially Southeast Asian islanders.