古代人写信,把写完的书信绢帛折叠成鲤鱼形,叫“缄”。也有人在信皮上画一条鲤鱼,作为传书的标志。有关鲤鱼传书的诗很多,如独孤及的《送何员外使湖南》诗:“王程傥未复,莫遣鲤鱼稀”;韦皋的《忆王萧》:“长江不见鱼书至,为遣相思梦入秦。”唐代诗人李商隐也有“双鲤迢迢一纸书”的名句。 The ancient people wrote a letter, the finished letter silk silk folded into a carp-shaped, called “silent.” Some people also carved a carp letter, as a sign of the book. There are a lot of poems about the common carp, such as Tokgo and “sent to outsiders to make Hunan” poem: “Wang Cheng 傥 not complex, Mo cut carp thinning”; Wei Gao’s “Wang Yi Xiao”: “ To send dreams into Qin. ”Tang Dynasty poet Li Shangyin also“ double carp 迢 迢 a paper book, ”the famous sentence.