Legal basis: Article 93 of the Interpretation of the Supreme People's Court on the Application of the Criminal Procedure Law of People's Republic of China (PRC): For electronic data such as e-mail, electronic data exchange, online chat records, blogs, Weibo, mobile phone short messages, electronic signatures, domain names, etc., the following contents should be emphatically checked: (1) Whether it is transferred with the original storage medium; When the original storage medium cannot be sealed, it is inconvenient to move, or it should be kept, processed and returned by the relevant departments according to law, whether the extraction and copying of electronic data are carried out by more than two people, whether it is enough to ensure the integrity of electronic data, and whether there is a written explanation and signature on the extraction and copying process and the storage location of the original storage medium; (2) Whether the collection procedures and methods comply with laws and relevant technical specifications; Whether the electronic data collected through investigation activities such as inquest, inspection and search are accompanied by transcripts and lists, and signed by investigators, electronic data holders and witnesses; If there is no signature of the holder, whether to indicate the reason; If overseas or remote electronic data are retrieved remotely, whether relevant information is indicated; Whether the specifications, categories and file formats of electronic data are clearly marked; (3) Whether the content of electronic data is true, whether it has been deleted, modified or added, etc. ; (four) whether the electronic data is related to the facts of the case; (five) whether the electronic data related to the facts of the case are collected completely; If there is any doubt about electronic data, it shall be identified or checked.