As long as it is an internal process, it needs internal audit, screening and evaluation.
Another reason is that hr needs to invite some candidates who meet the requirements in industry and post experience. Usually, a group needs to recommend 2-3 resumes to meet the standards, and it also needs to collect more candidates, talk about their intentions, and then recommend better candidates in the medium term after screening.
Based on the above factors, it generally takes 1-3 working days.