When taking time off due to family affairs, the specific matters can be various situations such as family illness requiring care, family emergencies, family maintenance or decoration requiring home supervision, accompanying family members when visiting relatives, and handling important family affairs (such as moving and signing documents).

As long as these things really need to be handled in person and cannot be done outside working hours, they are all reasonable reasons for taking time off. When taking time off, you only need to explain to the unit or superiors that you need to take time off to deal with family affairs, and the specific private content does not need to be disclosed in detail.