随着反腐败斗争的深入，智能型犯罪分子的作案手法越来越诡秘；为了达到掩盖犯罪事实的目的，往往采用文字以外的其它符号暗记一些犯罪行为，给文检工作带来了新的问题。利用文字以外的图型符号的种类繁多，鉴定难度较大、在举证中带来诸多不便。如甲、乙二人系某公司采购员， With the deepening of anti-corruption struggle, the criminal tactics of intelligent criminals are becoming more and more secretive. In order to achieve the purpose of covering up the facts of crime, often using other symbols than words to conceal some criminal acts brings new problems to the literary inspection work . The variety of pictorial symbols outside of the text makes it difficult to identify and brings a lot of inconvenience to the burden of proof. Such as A, B two Department of a company buyer,