Published articles are generally collected by HowNet, Wanfang, VIP and Long Yuan. However, if your graduation thesis needs to be tested in the later stage, it will be detected as published content to calculate the coincidence rate, so the thesis has been taken by others to apply for the subject, and you can't apply any more.
Matters needing attention in applying for a thesis:
Before the master's thesis, you can choose a topic according to your hobbies, fields you are good at or your own work. It is necessary to make a clear paper organization, read more master's thesis writing, determine the topic of your master's thesis after communicating with your tutor, and list the outline of the thesis according to the topic.