The validity period of industrial and commercial electronic signature is 5 years.

People's Republic of China (PRC) Electronic Signature Law was formally implemented. Article 14 of the law stipulates: "A reliable electronic signature has the same legal effect as a handwritten signature or seal." Article 13 stipulates what is a reliable electronic signature: "An electronic signature shall be regarded as a reliable electronic signature if it meets the following conditions:

When the electronic signature production data is used for electronic signature, it belongs to the exclusive of the electronic signer; When signing, the electronic signature production data is only controlled by the electronic signer; Any changes to the electronic signature after signing can be found; Any changes to the content and form of the data message after signing can be found. "