我国古代书信, 在纸尚未发明之前, 是用木板和竹片作为 书信的。根据近代大 量的出土文物来看,在秦汉时期,文字是写在木板和竹片上的,称“犊”和“简”、书信也不例外。因汉代皇帝的诏书是写在一尺一寸长的书版上的,因称“尺一牍”,后省作“尺牍”,后来成为书信的通称,也别称“尺书、尺素、尺一书”。 书信又称“鱼书”,通常认为它出典于汉末蔡邕的古乐府《饮马 Ancient Chinese letters, in the paper has not yet been invented, is the use of wood and bamboo as a letter. According to a large number of unearthed relics in modern times, in the Qin and Han dynasties, the writing was written on wooden boards and bamboo sheets, calling “calves” and “jin”, and the letters were no exception. Because the imperial edict of the Han Dynasty was written on a one-by-one-inch edition of the book, it was called “ruler” by the province and later became the colloquial name of the epistle. It was also nicknamed “ruler, ruler, ruler book”. Letters, also known as “fish book”, is generally believed that it appeared in the Han Dynasty Cai Yong’s ancient Yuefu "drink horse