The researches on historical docunments both at home and abroad reveal that before Qin Dynasty there was a communication line dedicated to commercial activities running across Southwest China,Myanmar,India and Middle Asia.The studies on the newly found archeological materials confirm the definite existence of the communication line between Southwest China and India in Shang-Zhou Dynasty,which,through the communication line crossing India,Middle Asia,Iran and West Asia,Absorbed many factors from the culture of the Near East.

 古代中国西南海贝和象牙的来源_英文_段渝.pdf