Great numbers of metal weapons and resources excavated at many Phung Nguyen culture sites in northern Indochina are associated with the beginning with the Copper Age in Southeast Asia.[twenty] In addition, the start from the Bronze Age continues to be confirmed for approximately 500 BC at Đông Sơn. Vietnamese historians https://ricardogqyhn.blogs-service.com/61989855/a-review-of-gk88