According to reason, acknowledgements and statements in papers should not be included in the repetition rate.
However, there is too much competition in the paper system now, and some paper detection systems will count topics, thanks, statements and so on. In the repetition rate, so as to improve the repetition rate of system detection. This improvement did not improve the duplicate checking of papers, which led the authors to spend more money on repeated testing. Even for the detection rate, regardless of the quality of the paper!
Therefore, it is suggested that the author carefully choose the paper duplicate checking system.