What is the difference between China Development Bank’s recruitment of secretaries and outsourcing secretaries?

Hello, there are usually two ways for a unit to recruit secretaries. One is to recruit relevant secretarial staff according to the company's own establishment, which is considered a formal establishment, and the other is through outsourcing. Companies, that is, human resources outsourcing service companies, have companies that specifically recruit clerks and then indirectly serve the final unit. Therefore, if there is an opportunity, it is best to apply directly for the establishment position instead of It's an outsourcing method.