Under normal circumstances, the company's signature needs to download the app of market supervision and management in a province by mobile phone, enter as an enterprise, log in the tax identification number for authentication, or follow the prompts.

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

(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.