The thesis is intent on probing into people who carried North System Bronze Culture to Xinanyi area by the case study on Bent Handle Sword, Bouble Rounded Caky Sword and Three Furcate Handle Sword, based on previous study conclusions.

A iron sword with bronze handle was unearthed in a tomb of Shanrong culture in Yanqing,the age was about the early phase of medium-term of Spring and Autumn period.