Electronic document, a narrow concept, namely electronic signature document, is often used in daily work and life. Electronic signature document is a legal digital document, and its essence is electronic signature data message, not paper document visualization. Photographs, scans and faxes of paper signed/stamped documents are not legal electronic documents because they do not conform to the electronic signature law.

The release of bomb address is located on the platform of mobile signature and real person sending and receiving electronic documents. Based on "digital identity+digital address+digital signature+digital document+digital delivery", everyone (individual/organization) can "sign contracts remotely, sign contracts online at any time, and send and receive electronic documents in real time".