A seal with the attribute of electronic signature has legal effect; Otherwise, the printed seal has no legal effect without the approval of the other party. General electronic signatures need a unified format or unit announcement to explain. Article 14 of the Electronic Signature Law of People's Republic of China (PRC), a reliable electronic signature has the same legal effect as a handwritten signature or seal.

Legal basis:

Article 214 of the Civil Code establishes, changes, transfers and extinguishes the real right of immovable property, which should be registered according to law, and becomes effective when it is recorded in the register of immovable property. Article 215 of the Civil Code: A contract concluded between the parties on the establishment, alteration, transfer and extinction of the real right of immovable property shall come into effect upon the establishment of the contract, unless otherwise provided by law or agreed by the parties; Failure to register the real right shall not affect the validity of the contract.