The Liaoning bronze dagger culture or Lute-shaped bronze dagger culture is an archeological complex of the late Bronze Age in Korea and China. Artifacts from the culture are found primarily in the Liaoning area of northeast China and in the Korean peninsula. Various other bronze artifacts, including ornaments and weapons, are associated with the culture, but the daggers are viewed as the most characteristic. Liaoning bronzes contain a higher percentage of zinc than those of the neighboring bronze cultures. Lee Chung-kyu considers that the culture is properly divided into five phases: Phases I and II typified by violin-shaped daggers, Phases IV and V by slender daggers, and Phase III by the transition between the two. Of these, remains from Phases I, II and III can be found in some amounts in both the Korean peninsula and northeast China, but remains from Phases IV and V are found almost exclusively in Korea.
Violin-shaped daggers
The early phase consists of an early period of bronze manufacture without daggers, followed by a period of producing violin-shaped daggers. The prime period of production of violin-shaped daggers is dated to the 8th and 7th centuries BCE. The earliest artifacts from this period are found exclusively in China, and seem only gradually to have spread to the Korean peninsula. By Lee's Phase II, however, a distinctive notched form of dagger begins to emerge in southern Korea, suggesting that by this time independent bronze production had begun in that region. Evidence gained from pottery indicates that the bronze dagger "culture" of this time actually included several distinct cultural groups. One distinct pottery tradition is found in northeast China and northwestern Korea, another in the Taedong River valley, another in the southwest around the Chungcheong provinces including the Geum River, and yet another throughout the rest of the southern Korean peninsula including Jeju island.
Slender daggers
This later part of the Liaoning bronze dagger culture is often referred to as the "Korean bronze dagger culture," since it was largely restricted to the Korean peninsula. At this point the Liaoning culture artifacts begin to disappear from the northeast China area. A new form of dagger begins to turn up on the Korean peninsula, straight and slender. The greatest concentration of bronze daggers is found in the GeumRiver valley of South Chungcheong province. Away from this area, the daggers become progressively fewer. This appears to indicate that most daggers were produced in the Geum valley, and the other cultures of the peninsula acquired them primarily by trade. Trade also took place by sea, with artifacts from the Later Phase found in Japanese archeological sites as well. Lee divides this phase into two distinct sections: one dating to the 3rd century BCE in which the production of slender bronze daggers predominated, and one dating to the 2nd century BCE in which daggers are often accompanied by bronze mirrors with geometric designs and halberds influenced by the Chinese Qin state. In the first part, a single pottery culture typified by clay-band applique is found throughout the Korean peninsula, but in the second part distinctive pottery types emerge in the northwest and the remainder of the peninsula.
Historical identity
The disappearance of the Liaoning bronze dagger culture from China appears to coincide with the State of Yan's conquest of that area. The Korean bronze dagger culture of the Later Phase appears to correspond with the state of Jin, which occasionally enters Chinese annals as a contemporary of Wiman Joseon. Lee views this as the period of emergence of the "walled-town states" in Korean culture, a hierarchical political structure in contrast to the tribal system which had prevailed during the Neolithic period.
