Employees must report to the employing unit within the specified time, sign an employment contract with the employing unit once a year, and take passing the annual examination as the basic condition for renewal. In principle, the service period is not less than 3 years. After 3 years, the employing unit shall go through the formalities of renewal or dismissal according to the relevant policies and regulations, and the graduation certificate of the employed personnel shall be kept by the employing unit. If you need to take any other type of recruitment examination within 3 years, you need to apply to the employer in advance, and you can apply only after the employer agrees. Daily management refers to on-the-job preparation.