The copyright protection of EI (Engineering Index) international conference papers is relatively strict. EI is an internationally renowned engineering technology database, which contains engineering technology literature and conference papers in major fields around the world. In order to protect academic originality and authors' rights and interests, EI requires that conference papers must meet the copyright requirements in the process of submission. This usually requires the author to sign a copyright transfer agreement before submitting the paper to ensure that the copyright of the paper belongs to the corresponding academic group or publishing institution. In addition, EI also conducts strict review and duplicate checking to ensure the credibility and originality of the paper. Therefore, it can be said that the copyright protection of EI international conference papers is very strict.