印章是权力的象征,是执政者的信物,因此人们又将印章称之为印信。《说文》释印为“执政所持信也”。《文献通考》亦云“无玺书,则九重之号令不能达于四海;无印章,则有司之文移不能行之于所属”,都对印信的政治作用作了透彻的说明。因此印信也为历代统治者所重视。印信的分类191 The seal is a symbol of power and a token of the ruling party, so people call the seal an imprint. “Said the text” release as “the ruling held by the letter also.” The text of the Tongkao test also goes to the clouds. “Without the seal book, the order of the Jiuzhong order can not reach the whole world. Without the seal, the division of the division can not be carried out in its own possession.” Both of these documents provide a thorough explanation of the political role of the letter letter. Therefore, India’s letter is also valued by successive rulers. Typographic classification 191