Compared with other free duplicate checking systems, this database is relatively complete. However, it lacks a particularly important database, that is, the school's thesis database, which is full of articles sent by some school students themselves, but there is still a confidentiality period of 2-3 years, so there is nothing but the school's HowNet. If you want to add this part, you can build your own library and add related papers, such as those of seniors and sisters, to find out.

If you are satisfied with my answer, please adopt it in time. Thank you.