A finished sword blade only weighed two catties, but Chen had to start out with three catties of high-grade steel, for much metal was lost as he filed, sharpened, and polished away. The entire process took at least a month.
要打出八兩重的精鋼需費時一星期，一把劍雖只有兩斤重，可是經過銼、磨平、磨亮、開刃等功夫，一把劍身要用三斤重的精鋼才能打造完成，時間最少要一個月。