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    Summary of content:To the Song Dynasty，As a evidence for the development of overseas trade，During the Southern Song Dynasty, Qin Jiushao wrote the book "Nine Books Nine Chapters"，Two questions related to overseas trade Bet365 app download appeared in the book，This has never appeared in the previous math book。The content of the first question is to seek agarwood、Franm and 玳瑁 玳瑁; the second question is the profit distribution of profit during funding trade。This article mainly discusses the second question，Methods for fundraising at that time，Records through numbers，I made detailed discussions。Of course，There are still some problems in "Mathematics Nine" to be solved: First, the profits of agarwood are too thin，Is there bet365 live casino games any error in the unit's record? The second is the large number of pepper，Is it related to the demand at that time? but，Marco Polo has marked the huge usage of Hangzhou pepper，It is estimated that the pepper pepper in the Southern Song Dynasty was also used in large quantities。 

　　Tu Fei Youzi，Researcher at the Toyo Library of Japan，Doctor of Cultural Exchange。Long -term engaging in ancient Chinese overseas trade research，Published "Research on the History of the South China Sea bet365 live casino games Trade in the Song Dynasty"、"Franm Test -Li Jin の と と と と と と と" and other discussions。email: dohiyuko@db3.so- net.ne.jp