Legal analysis: 1, effective 2. Lock the real identity of the contracting party, effectively prevent the document from being tampered with, and accurately record the signing time. 3. The electronic contract document stamped with the contract seal can be used as a legal basis.

Legal basis: People's Republic of China (PRC) Electronic Signature Law.

Article 5 A data message that meets the following conditions shall be deemed to meet the original form requirements stipulated by laws and regulations:

(a) It can effectively express the content and can be used at any time;

(2) It can reliably ensure that the content remains complete and unchanged from the time it is finally formed. However, adding endorsements to data messages and changing forms in the process of data exchange, storage and display do not affect the integrity of data messages.

Article 6 Data messages that meet the following conditions shall be deemed to meet the requirements for document preservation as stipulated by laws and regulations:

(a) It can effectively express the content and can be used at any time;

(2) The format of the data message is the same as that when it was generated, sent or received, or the format is different, but it can accurately represent the content originally generated, sent or received;

(3) Being able to identify the sender and receiver of the data message and the time of sending and receiving.