There are several points to pay attention to when choosing duplicate checking portal. First, we must choose a regular and well-known detection system. For a regular and well-known duplicate search portal, it is often guaranteed in the aspects of paper detection effect and paper data security. It is irregular, and most of them will have the risk of paper leakage without using the user's duplicate check entrance. Once the paper is leaked, it will cause great crisis to check the duplicate of the paper, especially for college graduates. Repeated inspections affect whether college graduates can graduate smoothly and on time.

When selecting repeated entries, we should choose the same repeated entries as schools and institutions, not the same repeated entries as papers. Because of the different databases of the paper data, there are errors in the duplicate entries of the paper. Choosing the same duplicate items as universities and institutions can greatly avoid the error of duplicate checking rate when universities and institutions conduct unified duplicate checking. It is suggested to look at the repeated entries of China HowNet. When choosing duplicate items, we should pay attention to matching. For a paper, it is often necessary to check the duplicate several times before it can pass the duplicate check smoothly. Most duplicate check items are charged, which is unbearable for college graduates without income. It is suggested that Wanfang and HowNet can be selected for duplicate checking of the first draft of the paper. The price of this kind of duplicate checking entrance is very favorable, and the use effect and duplicate checking effect are very good. For the final paper, China HowNet is recommended, which is the most authoritative and widely used duplicate search term at present.