According to Article 16 of the Labor Contract Law: "The labor contract shall come into effect after the employer and the employee reach an agreement through consultation, and the text of the labor contract shall be signed or sealed by the employer and the employee. The text of the labor contract is held by the employer and the employee respectively. " A labor contract must be signed by both the employer and the employee before it can take effect. If the employer fails to seal the labor contract, the labor contract will not have legal effect. The invalidity of the labor contract does not affect your labor relationship with the employer. As long as you have evidence to prove that you work in an employer, there is a de facto labor contract relationship between you. In addition, if there is a dispute in the future, you can also claim that the employer has not concluded a written labor contract with you, and the employer will prove that it has indeed concluded a written agreement with you.