of the sea Cao Yuan frowned.an Qingyu smiled. "it's a simple question. Just leave them a knife for seven nights." "when Lin heard this sentence, he was stupefied at first, then a glimmer of light appe...obably means that only forging the body of the sword is not enough, it is necessary to inject "meaning" into the sword and let the sword produce "emotion" in order to truly communicate spiritually.but...