 According to the "Bei Shi" (Dynastic History of Northern Dynasties) and the "Sui Shu" (Chronicles of the Sui Dynasty), both Chinese records, this area belonged originally to the territory one of the five semi-nomadic Shiwei, the Bo Shiwei tribes ().Their settlements were located on the north of the Yilehuli Mountains in the upper reaches of the Nen River, south of the Stanovoy Range, west of the Bureya and the Malyi Khingan ranges and reaching the Okhotsk Sea on the northeast.They brought tributary presents to the Tang court and disappeared at the dawn of the tenth century with the foundation of the Liao empire.