2. The abstract part needs to briefly introduce the research background, research purpose, research methods, research results and conclusions.
3. The table of contents lists the chapters and main contents of the paper, which is convenient for readers to quickly understand the structure and content of the paper.
4. The research background part needs to introduce the importance and application status of engineering cost in construction engineering, as well as the existing problems and challenges.
5. The research method part needs to introduce the research methods and technical means adopted in this paper, including literature review, field investigation, case analysis and data analysis.
6. The research results and conclusions need to be elaborated, including major findings, innovations and contributions.