There is no specific time limit. It is only a matter of time before the paper is included in the duplicate checking system. If you want to determine whether the paper is included in the database of the duplicate checking system, you only need to log in to the duplicate checking system and submit the paper to the duplicate checking system, and it will be automatically detected.

If the corresponding paper can be found, it means that the paper has been stored in the duplicate checking database. Generally, the papers after duplicate checking will not be included in the database immediately, but will be used as a comparative database for next year.

Papers that are not included will be re-examined.

HowNet has a large number of master's and doctoral theses, but these papers will not be included in that year. Master graduates or doctoral graduates will submit papers for duplicate checking in the graduation year, and their papers will not be included in HowNet in the graduation year, and will not be included until the next year.

Regarding whether graduate seniors' papers can be checked by the school knowledge network, the reference seniors can't pass the paper detection system of China knowledge network.