1. Literal data and digital data (including charts) directly related to the topic, such as statistics, typical cases, experience summary, etc. 2. Other people's research results. 3. Materials of marginal disciplines. 4. Celebrity-related remarks and relevant policy documents. 5. Background materials.

_ Build a string of virtues, make a plan, make a plan, and add a fierce persimmon. Second, Zhang Ye, Muye, people break the suburbs of mulberry, mulberry, duck, and persimmon are of low value. Wave a fierce persimmon? "A clever woman can't cook without rice", the research can't be carried out, the viewpoint can't be established, and the paper can't be formed. Therefore, detailed possession of information is another extremely important work before graduation thesis writing.