Legal analysis: With the development of science and technology, many industries use data messages to prove their identity and express their approval of signed documents, rather than handwritten signatures, in order to improve efficiency. This alternative method is "electronic signature".

Legal basis: Article 13 of People's Republic of China (PRC) Electronic Signature Law shall be regarded as a reliable electronic signature if it meets the following conditions at the same time:

(1) When the electronic signature production data is used for electronic signature, it belongs to the exclusive rights of the electronic signer;

(2) When signing, the electronic signature production data is only controlled by the electronic signer;

(3) Any changes to the electronic signature after signature can be found;

(4) Any changes to the content and form of the data message after signature can be found.

The parties can also choose to use electronic signatures that meet their agreed reliable conditions.