Extended data
Generally speaking, the paper duplication checking enterprises in regular operation will promise not to disclose the papers submitted by users. If the user's paper is leaked, it will bear legal responsibility and the user has the right to pursue it. If the network-certified paperok official website checks duplicate, any files submitted by users will not be added to the comparison database. Paperok is a free paper detection system under Hunan Xuesou Technology Co., Ltd. paperok paper detection is based on big data, massive academic literature resources and Internet resources, adheres to the principles of objectivity, fairness, accuracy and comprehensiveness, manages academic misconduct, provides users with objective and detailed duplicate checking reports, and provides support for publishing, scientific research and academics.