The introduction of the paper should be placed at the beginning of the text.

Introduction is the opening part of the paper, usually in front of the text. Its main purpose is to guide readers into the topic of the paper, provide background information, clarify research problems, and summarize research objectives and methods. Putting the introduction at the beginning can attract readers' attention and give them a clear expectation of the content of the paper. This approach helps readers to understand the research context and provide the necessary basis for subsequent argumentation and analysis.