Ru kilns and Guan kilns

Ru kilns and Guan kilns are the two large famous kilns in Northern Song Dynasty. Because the position of the kilns is undeterminable, the research work is only based on the guess record of the two kilns of the product handed down from ancient times. Confirming the concrete position of the kilns contributes to study of the relation between two kilns' producing and developing and porcelain production state.