And i have read on the net that these sword were cast more than one time, so that the edge were cast from harder bronze (more tin content ) while the body of the blade were cast from less brittle bronze.

• 我曾在网上看过这些刀剑是不止一次的浇铸的，在刀锋边缘会用硬一点的黄铜（含锡量多一些），而中间的地方会相对用软一点的黄铜造。