Ordinary letter annual report is a service of postal service and a business launched by China Post Group Corporation. It refers to a way for enterprises or individuals to send annual reports to relevant departments or institutions by ordinary mail. Ordinary letter annual report is applicable to all kinds of enterprises and institutions, individual industrial and commercial households, farmers' professional cooperatives and other organizations and individuals, including industrial and commercial administration, taxation, customs, foreign exchange management, banking and other departments and institutions. The use of ordinary mail annual report can easily mail the annual report, reduce the transmission and storage costs of paper documents, and is also conducive to environmental protection, energy conservation and emission reduction.