According to Article 37 of the Labor Contract Law: "The employee may terminate the labor contract by giving a written notice to the employer 30 days in advance. The employee may terminate the labor contract by notifying the employer three days in advance during the probation period. " If an employee resigns 30 days in advance, the employer shall not detain the employee's application for resignation or disapprove the employee's application for resignation. However, when employees claim their rights, they also need to prove that they have indeed applied for resignation, such as keeping the signature of the leader or the receipt of express delivery, mailing the receipt of letters and so on. If the evidence is complete, the employee has the right to leave after 30 days; If the company fails to handle it within the time limit, it needs to compensate the losses caused to the employees.