Title: accurate, concise and clear, in line with the index requirements, Chinese titles generally do not exceed 20 Chinese characters.

Author's unit: provide the name and zip code of the author's first-and second-level units.

The purpose of this paper is to summarize the content of the paper, including four basic elements: research purpose, method, result and conclusion. There are no annotations and notes, and the important contents of the paper are described concisely and accurately in the third person. The first person, such as "I, the author, this article", need not be called the subject, and it is appropriate to use about 200 to 300 words.

Keywords: 3-8 words that are meaningful to express the theme of the paper.

About the author: Name (year of birth)? , gender (Han nationality can be omitted)? Native place, education (degree), professional title, position and research direction. Please provide the contact number and email address of the first author.

References: The quoted contents are marked in this paper with sequential coding system.

Fund project: If the article is the result or partial result of the fund project, please provide the name and number of the fund project.

China Library Classification Number: Classify according to China Library Classification (4th Edition). If the author can't find it, this item can be omitted and added by the editor when editing.

Document ID and commodity number can be left blank.