The retrieval of foreign SCI journals is very strict. We can use the duplicate retrieval software of China HowNet to detect the duplicate rate of SCI papers. At present, there are many versions of CNKI's repeated retrieval system, such as VIP (Academic Misconduct Document Detection System), TMLC (Academic Misconduct Detection System for Dissertations), AMLC (Academic Misconduct Detection System for Sci-tech Journals), SMLC (Academic Misconduct Detection System for Social Science Journals), English detection system and Chinese-English contrast detection system.

The VIP5.3/TMLC2 system of CNKI is the most concerned detection system at present, which is adopted by domestic universities and core journals, and is mainly used to detect the originality and authenticity of master's and doctoral theses. The database resources in this duplicate checking system are massive and comprehensive, and the accuracy of detecting core journals is also high, so it is also very suitable for duplicate checking of SCI papers.

Of course, for SCI papers, it is best to use a special English paper duplicate checking system. The most authoritative English paper duplicate checking system is Turnitin, which contains the most comprehensive and massive English data resources. This system is also widely used in the world, and many people who contribute SCI papers will use this software to check duplicates.