Individual leaders - Chinese foreign policy depends on the choices made by key elites, so it is more important to look at their perceptions than other levels of analysis. Although different interpretations or explanations for your topic may not be evident immediately, after reading a few sources, they should become more apparent. I can assist you in identifying different views. While it is important to analyze the relative strengths and weaknesses of competing explanations, you do not have to choose one existing explanation decisively over the others. Intelligent creativity is encouraged.
Some people prefer to distinguish between empirical and analytical sections of the paper.
The choice is yours. Providing sub-titles in a long paper may be helpful. The conclusion should summarize the paper analytically and if relevant, point to potential areas for further research. Also, it's better to err on the side of excessive citations than risk unintended plagiarism. Aside from the basics, please indicate if you are graduating this term.