I used to think this was exaggeration, but later when I saw them on sword blades I realized it was true, "says Huang Te-chuan, an executive director of the ROC Arts Knife and Sword Preservation Society.
以前看到這些文字，覺得古人真是誇張，後來看到刀劍上的紋路，才知道真有其事」，中華民國美術刀劍保存協會常務理事黃德傳說。