Whether we can find the contents of the external network when we check the duplicate papers depends on whether there are foreign data in this duplicate checking system. Some paper duplicate checking systems will publish the comparison range of databases, such as HowNet, which contains a lot of English data. Therefore, if you use HowNet to check for duplicates, even if you learn from the contents of the external network, you are likely to be found to be duplicates.

Not only do English papers borrow articles from foreign websites or other languages, but Chinese papers also learn from them, only they translate English into Chinese. Therefore, some duplicate checking systems seem to have no comparison data from the external network, but they include Chinese papers copied from the external network, which is also at risk of being marked red.

In fact, the scope of paper repeated inspection depends on the size of the comparison database of the repeated inspection system. The larger the comparison database of the duplicate inspection system, the more paper types, language types and data types are supported. For example, HowNet, Wanfang, Weipu, PaperPP, etc. What we commonly use has its own data.