Core Points - The article discusses the essential elements of labor contracts, including mandatory clauses and additional provisions that can be included [4][5] - It emphasizes the importance of signing labor contracts within one month of employment and the requirements for electronic contracts [7][8] - The article outlines the retention period for labor contracts after termination, which is at least two years [10][11] Group 1: Essential Elements of Labor Contracts - Labor contracts must include the duration, job content, work location, working hours, remuneration, social insurance, labor protection, working conditions, and occupational hazard prevention [4] - Additional provisions such as probation periods, training, confidentiality, supplementary insurance, and benefits can also be included [5] Group 2: Signing and Retention of Labor Contracts - Labor contracts should be signed within one month from the start of employment, regardless of whether a probation period is agreed upon [7] - Employers must provide a physical copy of the electronic labor contract upon request and ensure it is consistent with the original electronic version [8] - Employers are required to retain labor contract texts for at least two years after termination or dissolution for reference [10][11]