According to Article 3 of the "Electronic Signature Law": In contracts or other documents, documents and other documents in civil activities, the parties may agree to use or not use electronic signatures and data messages.

The legal effect of documents agreed by the parties to use electronic signatures and data messages shall not be denied simply because they are in the form of electronic signatures or data messages.

The provisions of the preceding paragraph do not apply to the following documents:

(1) those involving personal relationships such as marriage, adoption, inheritance, etc.;

(2) those involving the suspension of water supply, Public utility services such as heating and gas supply;

(3) Other situations stipulated in laws and administrative regulations where electronic documents are not applicable.

In other words, except for the above three situations where electronic signatures (electronic signatures) are not applicable, electronic signatures (electronic signatures) can be used in other situations. For example, an enterprise's labor contract, product purchase and sale contract, supplier contract, and daily internal approval of the enterprise can all use electronic signatures to achieve rapid online signing and approval, thereby improving the operational efficiency of the enterprise.