Legal analysis: Without the parties meeting in person, the parties to the contract can sign an electronic contract or entrust others to sign the contract on their behalf. It can also be signed and sealed by one party first and then mailed to the other party, who then signs and seals it. Both parties need to reach an agreement on the content of the contract. One party signs and seals it first, and then mails it to the other party for confirmation of signature and seal.

Legal basis: Article 165 of the "People's Republic of China and Civil Code" If the authorization for an agency is in written form, the power of attorney shall state the name of the agent and the matters of the agency. , authority and time limit, and shall be signed or stamped by the principal.