The citation format does not meet the hownet recognition standard. The content of citation is that the cited documents meet the identification standard of HowNet. If the citation format of the reference is not standardized, the HowNet detection system may mark the reference in red to calculate the repetition rate, and will not detect the citation rate.

Normal. It is really rare that the duplicate check result is 0, so many students after duplicate check will be surprised to see this result, can't believe it, and will have doubts about the duplicate check of this paper, and even have doubts.

Usually, the probability that the test result of the paper is 0 is very low. If this happens, it is usually because you are not testing a paper, but some pictures or some data graphs.