The main sources of internal recruitment are

1. internal promotion: internal promotion is one of the main ways of internal recruitment. Enterprises select people with promotion potential from internal employees at all levels, evaluate them according to their abilities and experiences, and then give them corresponding positions and salaries. This way is conducive to motivating employees and providing them with more career development opportunities.

2. Job-hopping: Enterprises change employees from one position to another according to their abilities and interests. This way can help employees understand and try different jobs, and also help enterprises optimize the allocation of human resources.