If your graduation thesis has been reduced to 50%, it is already excellent, but in order to ensure that the thesis can successfully pass the duplicate checking test of schools and periodicals, you can take the following measures to continue to reduce the repetition rate of the thesis:

1. Further modify the language expression and sentence structure in the paper to avoid using common wording and sentence patterns, so as to reduce the similarity with other papers.

2. Increase the uniqueness and originality of the paper, such as adding your own research results, opinions and opinions, and highlighting the uniqueness and innovation of the paper.

3. Carefully check the format of references and citations to ensure the correct use of citation symbols and document formats to avoid being regarded as plagiarism.

4. For other people's content and materials cited in the paper, be sure to indicate the source and indicate it in the paper to avoid being considered plagiarism or plagiarism.

5. You can use a number of different duplicate checking software for detection, such as using duplicate checking software designated by schools or periodicals for self-examination to find possible duplicates or similar contents.