《史记·廉颇蔺相如列传》记述蔺相如既“使其从者衣褐,怀其璧从径道亡,归璧于赵”之后,廷见秦王时,与秦王的对话中写道:“且秦强赵弱,大王遣一介之使至赵,赵立奉璧来。”这里的“一介之使”,各种注本几乎都是解释作“一个使者”的,“介”就是“个”。这是个老问题。旧《辞海》就是这样解释的: “Historical Biographies of Lian Po Lin Hsiang-ju,” Lin Hsiu-ju's account of both “making him a slave to brown, pregnant with his path from death to death and returning to dying in Zhao,” wrote in his dialogue with the Qin king when he said: “And Qin Strong Zhao weak, the king sent a messenger to Zhao, Zhao Li Feng Bi. ”Here's“ a messenger ”, all kinds of Notes almost all interpreted as“ a messenger ”,“ mediated ”is“ a. ” This is an old question. The old “Ci Hai” is explained as follows: