The ancient Roman Empire called China Seres, which evolved from the Greek word Sere, meaning the country of silk. The earliest account of Cyrus was the Greek Ctesias, about the 4th century BC. Since then, the Greek scholar Strabo has recorded the historical fact that the Yue people "extended their territory to Thrace" when Kawachinoayanofumi and Emperor Jingdi were in contact with the territory of the Western Han Dynasty. During the reign of the Roman emperor Augustus (from 63 BC to AD 14), the poet P·V·Maro also mentioned Cyrus many times. Florus, a Roman historian, said that when Emperor Augustus was in power, there were Cyrus people who came to see him. In addition, the Roman writers of this period, such as Ponponius Mela and Gaius Pliny the Elber, also talked about Cyrus.