What is the increase in social security of Beijing provident fund?

The social security increase time of Beijing provident fund is from 9 am to 5 pm on weekdays. The time for Beijing Social Security to add or delete employees is from May to 25th of each month, and the original unit only reduces employees on 25th, so the new unit can't add employees on that day, and can only add employees after 5th of next month. It is legal to reduce employees within 15 days after the former company leaves, and it is legal to increase employees within one month after the new company joins. The working hours of social security staff of Beijing Provident Fund are from 9: 00 am to 5: 00 pm on weekdays, and the rest time is noon 12- 13.