What's the difference between employment type code 000 and 900?

Different occupations have different technical contents.

1, different occupations: 000 jobs refer to civilian job recruitment, including logistics and administration. And 900 jobs refer to workers with low technical content, such as electricians and welders.

2, the technical content is different: the code at the beginning of 9 has low skill requirements, and the number of waiters, front-line operators, and the number at the beginning of 0 is mental workers, which will increase the number of people in the group.