The Chinese Records of Three Kingdoms state that the language and culture of Byeonhan was essentially the same as Jinhan, and archaeological artifacts show little difference.
According to the 3rd-century Chinese chronicle Records of Three Kingdoms, Byeonhan was known for the production of iron;[REF] it exported iron to the Han commanderies to the north, Yamato Japan[REF][REF] and the rest of the Korean peninsula [REF].