This should be easy to write. See the corporate culture of the company. If it is more relaxed and casual between superiors and subordinates or between departments, it is good to talk about your thoughts in general. If it is bureaucratic or more rigorous, then ask for instructions in red-headed documents.
such as
Hello, manager xxx.
How many new employees did our company recruit on a certain day in a certain year? Recently, some employees consulted about handling social security-related matters (depending on the situation, whether to add this sentence can avoid ... you know). According to the relevant regulations of our company and the requirements of the Human Resources and Social Security Bureau (if there is a deadline, it is best to indicate it together), a list of qualified personnel such as those who have completed the probation period is attached (see annex for the specific list and details). You can get a table in the annex. Detailed information of personnel, such as name, employment time, salary payment ratio, expenses, etc.
* * * How many people need to pay the total cost (year or month) (this is something that the department head is concerned about or he just needs to know)
In the above situation, please ask the leaders to know whether to reply or telephone instructions when handling or otherwise requesting.
Personnel Department xxx (the department will not sign it according to the situation)