I would like to ask everyone whether the graduation thesis plagiarism check results on Xuexin.com are highly reliable?

The reliability of the plagiarism check results generated by Xuexin.com, specifically for graduation theses, is generally considered high within the Chinese academic context, but this assessment must be qualified by understanding the system's design, scope, and inherent limitations. As the official platform designated by China's Ministry of Education for managing higher education information, Xuexin.com integrates the academic misconduct detection system, which primarily compares submitted texts against a massive and proprietary database. This database is uniquely comprehensive for Chinese-language materials, encompassing published academic journals, domestic theses and dissertations, and a vast array of internet sources within China. Its institutional mandate and direct access to degree-granting institutions' thesis archives provide it with a coverage of Chinese academic output that is difficult for any other commercial service to match, making its detection of verbatim copying or significant duplication from these sources highly authoritative.

However, the concept of "high reliability" is contingent on what one expects the system to detect. Its primary strength lies in identifying textual similarity, not necessarily sophisticated plagiarism involving paraphrasing, idea theft, or translation from foreign-language sources. The system's algorithms are tuned to flag matching strings of text, and its reported similarity percentage is a mechanical measure, not an intellectual judgment on academic integrity. A low similarity score does not automatically certify originality, just as a high score may include properly cited quotations or unavoidable technical terminology. Furthermore, the system's database, while extensive, may not be exhaustive for all disciplines, particularly for very recent publications or niche, non-digitized materials. Its effectiveness against sources outside its curated Chinese-language corpus, such as obscure foreign publications or paywalled international journals, is inherently limited.

The practical reliability for a student or institution depends critically on the interpretive framework applied to the raw report. The system provides a diagnostic tool, but the final determination of plagiarism is a human decision made by thesis advisors and academic committees, who must review the flagged passages in context. Different universities set their own acceptable similarity thresholds and have policies for handling flagged material, meaning the same report could be deemed a pass at one institution and require significant revision at another. Therefore, while the technical operation of Xuexin.com's check is robust and its database is the national standard, its functional reliability is a product of both its algorithmic output and the specific academic norms and rigorous human evaluation of the user's institution. It is a powerful and necessary control mechanism, but it is not an infallible arbiter of academic originality on its own.