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By stamping the Esignature on the electronic documents, it can meet the needs of information integrity, legitimacy and nonrepudiation in the process of electronic office documents of government departments. In 2005, China Meteorological Administration began to promote the Esignature application in the electronic official document system, which effectively accelerated the whole electronic process within the China Meteorological Administration and improved the management efficiency. With the development of independent and controllable national security and Internet Plus government services, the Esignature service platform based on domestic cryptography and domestic format documents is built under the overall framework of the meteorological administration information system. The system provides electronic signature services for electronic document systems and administrative approval electronic certification applications through cloud services. The system runs stably in operation and improves the security and scalability of the business significantly.