Sign an online agreement contract. Online contracts should be signed according to the following criteria:

1, the parties reach an agreement through consultation, and they are persons with corresponding civil capacity;

2. The contents of the contract are true and legal;

3. To conclude a contract in the form of data message, a confirmation letter is required, and the contract is established when the confirmation letter is signed;

4. If the offer is published through the Internet, the contract is established when the other party accepts the offer and submits the order successfully.

Article 49 1 of the Civil Code stipulates that the parties conclude a contract by letter or data message. And ask for a confirmation, and the contract is established when the confirmation is signed.

If the information of a commodity or service released by one party through information networks such as the Internet meets the conditions of the offer, the contract is established when the other party successfully selects the commodity or service and submits the order, unless otherwise agreed by the parties.