Legal analysis: electronic seal can't be stamped. According to the relevant national laws and regulations, if a labor contract is signed electronically, it can be signed electronically, and a reliable electronic signature that meets the prescribed conditions has the same legal effect as a handwritten signature or seal.

Legal basis: Article 13 of the Electronic Signature Law of People's Republic of China (PRC) shall be regarded as a reliable electronic signature if the electronic signature meets the following conditions at the same time: (1) When the electronic signature production data is used for electronic signature, it belongs exclusively to the electronic signatory; (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.