Legal analysis: about one month, 30 days' written notice is enough for contract workers. If the business is in preparation, it needs the approval of the Education Bureau. According to the relevant laws and regulations, public teachers need to submit a resignation report, which will be approved by the organization department after being approved by the unit and the competent department. If a teacher resigns, he must submit a written resignation report to his unit 30 days in advance.

Legal basis: People's Republic of China (PRC) Labor Law.

Article 31 A laborer who terminates a labor contract shall notify the employer in writing 30 days in advance.

Article 32 Under any of the following circumstances, the employee may notify the employer to terminate the labor contract at any time: (1) During the probation period; (2) The employing unit forces labor by means of violence, threat or illegal restriction of personal freedom; (three) the employer fails to pay labor remuneration or provide working conditions in accordance with the labor contract.

Article 24 A labor contract may be dissolved after the parties to the labor contract reach an agreement through consultation.