Legal subjectivity:

If the contract is in writing and only has Party B’s signature but not Party A’s signature and seal, the contract is invalid. The contract must be signed by both parties to be valid, and if the other party is an employer, it must be stamped. If the contract is in electronic form, a confirmation must be signed in advance, otherwise, the contract will be invalid. Legal objectivity:

Article 143 of the Civil Code is valid for civil legal acts that meet the following conditions: (1) The actor has the corresponding capacity for civil conduct; (2) The expression of intention is true; ( 3) Do not violate the law. The mandatory provisions of administrative regulations do not violate public order and good customs.