As the beginning of scientific papers,the purpose of the introduction is account for the sequence of events of the study to readers,its function is to explain the research starting point, focus and value,to guide readers to read and understand the text.

1．Content of the introduction  
    Mainly include: study on the reasons, methods and expected results.First of all should be based on the brief introduction of the purpose of thesis writing; and then to illustrate the relationship between this study and previous research and difference, when it is necessary to mention the others' research achievements and basic principles,the preferred to refer to the literature form mark.Finally, by the domestic and international hotspot of the research and existing problems of research object of this article and its basic characteristics;hope to solve the problem of what, what is the role and significance of solving this problem.

2．Writing requirement of the introduction 

（１）Come to the point, don't beat around the bush. Avoid large space on the historical origin and the research process.

（２）Concise and comprehensive, make the key points stand out. Should not be too much to the peer known and textbook knowledge content, when it is necessary to mention others' research achievements and basic principles, mark it just only with reference citation form. When indicates the work and ideas of this paper in the introduction, it should be clear, the language should be concise.

（３）Respect for Science, seek truth from facts. When discussion of the significance of this study, should pay attention to propriety, avoid the use of “have very high academic value”、'fill the gaps at home and abroad”、'first discovered”and discomfort words;meanwhile also should notice not polite words, such as“have little talent and less learning”.

（４）Not with abstract the same, also should not be the annotations of abstract. Generally, introduction and conclusion should be corresponding, proposed the problems from introduction, should be answered in conclusion, but also should avoid it is same with the conclusion.

（５）Do not have to account opening and achievement appraisal procedure, also not have to references all the conclusions of something relevant to contract documents and identification.

（６）Brief introduction, it is best not to block it, don't list illustrations and derivation and proveof of mathematical formula .