Song, Yuan Liao ﹑ ﹑ gold at the border with the neighboring frontier set by the market
Song, Liao, Jin, Yuan at the border with the neighboring frontier established by the market. Trade officials presided over by the venue, Chuguan camp, merchants need to pay taxes, pay teeth money can only after receiving proof of trading. Song Su "son of Korea Notes on books of interest": "Chen Wen Pei Yao field, cut out the instruments, the law very strictly, only to Khitan it also." "The History of Food and Money Five": "Que field, and the enemy frontier of the things. "Ming Shen, FU" field listed allocated the Ministry of Maritime Affairs in Sea ":" The Song of the south bridge, its gaining Pu, from and after the good, and Jinguo Bo Yi, Yao field three , over a hundred million in the Estimation of its revenue. "Fan Wenlan Cai Meibiao such as" General History of China, "Chapter IV, Section VIII:" Song to stop the war, both sides in the establishment of the Huaihe River along the coast and western frontier trade market, as 'Yao field'. "